53 (number)
Encyclopedia : 5 : 53 : 53N : 53 (number)
53 (fifty-three) is the natural number following 52 and preceding 54.
| Cardinal | 53 fifty-three |
| Ordinal | 53rd fifty-third |
| Factorization | prime |
| Roman numeral | LIII |
| Binary | 110101 |
| Hexadecimal | 35 |
In mathematics
Fifty-three is the 16th smallest prime number. The next is fifty-nine. Fifty-three is also a Sophie Germain prime, and the sum of five consecutive primes (5 + 7 + 11 + 13 + 17). It is an Eisenstein prime with no imaginary part and real part of the form [3n - 1]. Since 53 is equal to the arithmetic mean of its two neighboring primes, 47 and 59, it is a balanced prime.
53 is a strictly non-palindromic number.
53 written in hexadecimal is 35, that is, the same characters used in the decimal representation, but reversed. Three multiples of 53 share this property: 371 = 17316, 5141 = 141516, 99481 = 1849916.
But 53 can not be expressed as the sum of any integer and its base 10 digits, making 53 a self number.
In science
- The atomic number of iodine.
Astronomy
- Messier object M53, a magnitude 8.5 globular cluster in the constellation Coma Berenices
- The New General Catalogue [object] NGC 53, a magnitude 12.6 barred spiral galaxy in the constellation Tucana
- The Saros [number] of the solar eclipse series which began on -1295 August 26 and ended on 220 February 21. The duration of Saros series 53 was 1514.5 years, and it contained 85 solar eclipses.
- The Saros [number] of the lunar eclipse series which began on -993 June 5 and ended on 287 July 12. The duration of Saros series 53 was 1280.1 years, and it contained 72 lunar eclipses.
In other fields
-->Fifty-three is also:
- The code for international direct dial phone calls to Cuba.
- The racing number of Herbie, a Volkswagen Beetle with a mind of his own, first appearing in the 1968 movie The Love Bug.
- In the title of the 1912 movie North of Fifty Three, remade in 1917.
- The jersey number of Los Angeles Dodgers pitcher Don Drysdale.
- The jersey number of Philadelphia Phillies right fielder Bobby Abreu.
- The number of short poems in the book Rumi Birdsong by Jelaluddin Rumi.
- The year AD 53, 53 BC, and 1953.
- The name of a webcomic by Daniel Creamer. See Number 53 (webcomic)
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