53 (number)
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53 is the natural number following 52 and preceding 54.
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| Cardinal | fifty-three | ||
| Ordinal | 53rd (fiftieth) | ||
| 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). But 53 can not be expressed as the sum of any integer and its base 10 digits, making 53 a self 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 = 1489916.
53 is a strictly non-palindromic number, it is not palindromic in any base from base 2 to base 51.
In science
- The atomic number of iodine
In astronomy,
- Messier object M53, a magnitude 8.5 globular cluster in the constellation Coma Berenices
- The New General Catalogue object (http://www.ngcic.org/) NGC 53, a magnitude 12.6 barred spiral galaxy in the constellation Tucana
- The Saros number (http://sunearth.gsfc.nasa.gov/eclipse/SEsaros/SEsaros1-175.html) 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 (http://sunearth.gsfc.nasa.gov/eclipse/LEsaros/LEsaros1-175.html) 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 number of the racing Volkswagen in the movie Herbie: Fully Loaded
- In the title of the 1912 movie North of Fifty Three, remade in 1917.
- The number of short poems in the book Rumi Birdsong by Jelaluddin Rumi.
- The year AD 53, 53 BC, and 1953.be:53 (лік)
es:Cincuenta y tres eo:Kvindek tri fr:53 (nombre) ko:53 ia:53 it:Cinquantatré ja:53 pt:Cinqüenta e três sl:53 (število) sv:53 (tal) zh:53