| ||||
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Cardinal | fifty-seven | |||
Ordinal | 57th (fifty-seventh) | |||
Factorization | 3 × 19 | |||
Divisors | 1, 3, 19, 57 | |||
Greek numeral | ΝΖ´ | |||
Roman numeral | LVII, lvii | |||
Binary | 1110012 | |||
Ternary | 20103 | |||
Senary | 1336 | |||
Octal | 718 | |||
Duodecimal | 4912 | |||
Hexadecimal | 3916 |
57 (fifty-seven) is the natural number following 56 and preceding 58. It is a composite number.
57 is semiprime [1] a Blum integer, [2] and a Leyland number. [3]
The split Lie algebra E7+1/2 has a 57-dimensional Heisenberg algebra as its nilradical, and the smallest possible homogeneous space for E8 is also 57-dimensional. [4]
Although fifty-seven is not prime, it is jokingly known as the Grothendieck prime after a legend according to which the mathematician Alexander Grothendieck supposedly gave it as an example of a particular prime number. [5] The error was committed by another famous mathematician Hermann Weyl in a published article. [6]