56931 has 8 divisors (see below), whose sum is σ = 86784. Its totient is φ = 32520.
The previous prime is 56929. The next prime is 56941. The reversal of 56931 is 13965.
It is a sphenic number, since it is the product of 3 distinct primes.
It is not a de Polignac number, because 56931 - 21 = 56929 is a prime.
It is a super-2 number, since 2×569312 = 6482277522, which contains 22 as substring.
56931 is a lucky number.
It is not an unprimeable number, because it can be changed into a prime (56911) by changing a digit.
It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1335 + ... + 1376.
It is an arithmetic number, because the mean of its divisors is an integer number (10848).
256931 is an apocalyptic number.
56931 is a deficient number, since it is larger than the sum of its proper divisors (29853).
56931 is a wasteful number, since it uses less digits than its factorization.
56931 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 2721.
The product of its digits is 810, while the sum is 24.
The square root of 56931 is about 238.6021793698. The cubic root of 56931 is about 38.4694760028.
The spelling of 56931 in words is "fifty-six thousand, nine hundred thirty-one".
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