53 (number)
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53 (fifty-three) is the
natural number In mathematics, the natural numbers are those numbers used for counting (as in "there are ''six'' coins on the table") and ordering (as in "this is the ''third'' largest city in the country"). Numbers used for counting are called ''cardinal ...
following 52 and preceding 54. It is the 16th
prime number A prime number (or a prime) is a natural number greater than 1 that is not a product of two smaller natural numbers. A natural number greater than 1 that is not prime is called a composite number. For example, 5 is prime because the only ways ...
.


In mathematics

*Fifty-three is the 16th
prime number A prime number (or a prime) is a natural number greater than 1 that is not a product of two smaller natural numbers. A natural number greater than 1 that is not prime is called a composite number. For example, 5 is prime because the only ways ...
. It is also an
Eisenstein prime In mathematics, an Eisenstein prime is an Eisenstein integer : z = a + b\,\omega, \quad \text \quad \omega = e^, that is irreducible (or equivalently prime) in the ring-theoretic sense: its only Eisenstein divisors are the units , itself ...
, an isolated prime, a balanced prime and a
Sophie Germain prime In number theory, a prime number ''p'' is a if 2''p'' + 1 is also prime. The number 2''p'' + 1 associated with a Sophie Germain prime is called a . For example, 11 is a Sophie Germain prime and 2 × 11 +  ...
. *The sum of the first 53 primes is 5830, which is divisible by 53, a property shared by only a few other numbers. *In hexadecimal, 53 is 35, that is, the same characters used in the
decimal representation A decimal representation of a non-negative real number is its expression as a sequence of symbols consisting of decimal digits traditionally written with a single separator: r = b_k b_\ldots b_0.a_1a_2\ldots Here is the decimal separator, i ...
, but reversed. Four additional multiples of 53 share this property: 371 = , 5141 = , 99,481 = , and 8,520,280 = 0. Apart from the trivial case of single-digit decimals, no other number has this property. *53 cannot be expressed as the sum of any integer and its decimal digits, making 53 a self number. *53 is the smallest prime number that does not divide the order of any
sporadic group In mathematics, a sporadic group is one of the 26 exceptional groups found in the classification of finite simple groups. A simple group is a group ''G'' that does not have any normal subgroups except for the trivial group and ''G'' itself. The ...
.


In science

*The
atomic number The atomic number or nuclear charge number (symbol ''Z'') of a chemical element is the charge number of an atomic nucleus. For ordinary nuclei, this is equal to the proton number (''n''p) or the number of protons found in the nucleus of every ...
of iodine


Astronomy

*
Messier object The Messier objects are a set of 110 astronomical objects catalogued by the French astronomer Charles Messier in his ''Catalogue des Nébuleuses et des Amas d'Étoiles'' (''Catalogue of Nebulae and Star Clusters''). Because Messier was only in ...
M53, a
magnitude Magnitude may refer to: Mathematics *Euclidean vector, a quantity defined by both its magnitude and its direction *Magnitude (mathematics), the relative size of an object *Norm (mathematics), a term for the size or length of a vector *Order of ...
8.5
globular cluster A globular cluster is a spheroidal conglomeration of stars. Globular clusters are bound together by gravity, with a higher concentration of stars towards their centers. They can contain anywhere from tens of thousands to many millions of membe ...
in the constellation
Coma Berenices Coma Berenices is an ancient asterism in the northern sky, which has been defined as one of the 88 modern constellations. It is in the direction of the fourth galactic quadrant, between Leo and Boötes, and it is visible in both hemisphe ...
*The New General Cataloguebr>object
NGC 53, a magnitude 12.6
barred spiral galaxy A barred spiral galaxy is a spiral galaxy with a central bar-shaped structure composed of stars. Bars are found in about two thirds of all spiral galaxies, and generally affect both the motions of stars and interstellar gas within spiral galaxies ...
in the constellation
Tucana Tucana (The Toucan) is a constellation of stars in the southern sky, named after the toucan, a South American bird. It is one of twelve constellations conceived in the late sixteenth century by Petrus Plancius from the observations of Pieter D ...


In other fields

Fifty-three is: *The racing number of
Herbie Herbie, the Love Bug is a fictional sentient 1963 Volkswagen Beetle, who has been featured in several Walt Disney motion pictures starting with the 1968 feature film ''The Love Bug''. He has a mind of his own and is capable of driving himself, ...
, a fictional
Volkswagen Beetle The Volkswagen Beetle—officially the Volkswagen Type 1, informally in German (meaning "beetle"), in parts of the English-speaking world the Bug, and known by many other nicknames in other languages—is a two-door, rear-engine economy car, ...
with a mind of his own, first appearing in the
1968 The year was highlighted by protests and other unrests that occurred worldwide. Events January–February * January 5 – " Prague Spring": Alexander Dubček is chosen as leader of the Communist Party of Czechoslovakia. * Janu ...
film ''
The Love Bug ''The Love Bug'' is a 1968 American comedy film directed by Robert Stevenson and the first in a franchise by Walt Disney Productions and distributed by Buena Vista Distribution that starred an anthropomorphic pearl-white, fabric-sunroofed 19 ...
'' *The code for international direct dial phone calls to
Cuba Cuba ( , ), officially the Republic of Cuba ( es, República de Cuba, links=no ), is an island country comprising the island of Cuba, as well as Isla de la Juventud and several minor archipelagos. Cuba is located where the northern Caribbea ...
* 53 Days is a northeastern USA rock band *''53 Days'' a novel by
Georges Perec Georges Perec (; 7 March 1936 – 3 March 1982) was a French novelist, filmmaker, documentalist, and essayist. He was a member of the Oulipo group. His father died as a soldier early in the Second World War and his mother was killed in the Hol ...
*In ''
How the Grinch Stole Christmas! ''How the Grinch Stole Christmas!'' is a Christmas children's story by Theodor "Dr. Seuss" Geisel written in rhymed verse with illustrations by the author. It follows the Grinch, a grouchy, solitary creature who tries to cancel Christmas by st ...
'', and its animated TV special adaptation the Grinch says he's put up with the Whos' Christmas cheer for 53 years. *Fictional 53rd Precinct in
the Bronx The Bronx () is a borough of New York City, coextensive with Bronx County, in the state of New York. It is south of Westchester County; north and east of the New York City borough of Manhattan, across the Harlem River; and north of the New Y ...
was found in the TV comedy "
Car 54, Where Are You? ''Car 54, Where Are You?'' is an American sitcom that aired on NBC from September 1961 to April 1963. Filmed in black and white, the series starred Joe E. Ross as Gunther Toody and Fred Gwynne as Francis Muldoon, two mismatched New York City p ...
" *"53rd & 3rd" a song by the Ramones *The number of
Hail Mary The Hail Mary ( la, Ave Maria) is a traditional Christian prayer addressing Mary, the mother of Jesus. The prayer is based on two biblical passages featured in the Gospel of Luke: the Angel Gabriel's visit to Mary (the Annunciation) and Mary's ...
beads on a standard, five decade
Catholic The Catholic Church, also known as the Roman Catholic Church, is the largest Christian church, with 1.3 billion baptized Catholics worldwide . It is among the world's oldest and largest international institutions, and has played a ...
Rosary (the Dominican Rosary). *The number of bytes in an
Asynchronous Transfer Mode Asynchronous Transfer Mode (ATM) is a telecommunications standard defined by American National Standards Institute (ANSI) and ITU-T (formerly CCITT) for digital transmission of multiple types of traffic. ATM was developed to meet the needs of ...
packet. *UDP and TCP port number for the
Domain Name System The Domain Name System (DNS) is a hierarchical and distributed naming system for computers, services, and other resources in the Internet or other Internet Protocol (IP) networks. It associates various information with domain names assigned t ...
protocol. * 53-TET (53 tone, equal temperament) is a
musical temperament In musical tuning, a temperament is a tuning system that slightly compromises the pure intervals of just intonation to meet other requirements. Most modern Western musical instruments are tuned in the equal temperament system. Tempering is the p ...
that has a fifth that is closer to pure than our current system. *''53 More Things To Do In Zero Gravity'' is a book mentioned in
The Hitchhiker's Guide to the Galaxy ''The Hitchhiker's Guide to the Galaxy'' (sometimes referred to as ''HG2G'', ''HHGTTG'', ''H2G2'', or ''tHGttG'') is a comedy science fiction franchise created by Douglas Adams. Originally a 1978 radio comedy broadcast on BBC Radio 4, it ...


Sports

*The maximum number of players on a
National Football League The National Football League (NFL) is a professional American football league that consists of 32 teams, divided equally between the American Football Conference (AFC) and the National Football Conference (NFC). The NFL is one of the ...
roster *Most points by a rookie in an NBA playoff game, by Philadelphia's
Wilt Chamberlain Wilton Norman Chamberlain (; August 21, 1936 – October 12, 1999) was an American professional basketball player who played as a center. Standing at tall, he played in the National Basketball Association (NBA) for 14 years and is widely reg ...
, 1960 *Most field goals (three-game series, NBA playoffs), by Michael Jordan, 1992


See also

* List of highways numbered 53


References

{{Integers, zero Integers