56705931 has 24 divisors (see below), whose sum is σ = 87023664. Its totient is φ = 35458560.

The previous prime is 56705921. The next prime is 56705939. The reversal of 56705931 is 13950765.

It is a happy number.

56705931 is a `hidden beast` number, since 5 + 67 + 0 + 593 + 1 = 666.

It is not a de Polignac number, because 56705931 - 2¹¹ = 56703883 is a prime.

It is a super-2 number, since 2×56705931² = 6431125221153522, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (56705939) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 69516 + ... + 70326.

It is an arithmetic number, because the mean of its divisors is an integer number (3625986).

Almost surely, 2^56705931 is an apocalyptic number.

56705931 is a gapful number since it is divisible by the number (51) formed by its first and last digit.

56705931 is a deficient number, since it is larger than the sum of its proper divisors (30317733).

56705931 is a wasteful number, since it uses less digits than its factorization.

56705931 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1291 (or 1288 counting only the distinct ones).

The product of its (nonzero) digits is 28350, while the sum is 36.

The square root of 56705931 is about 7530.3340563351. The cubic root of 56705931 is about 384.1871442938.

The spelling of 56705931 in words is "fifty-six million, seven hundred five thousand, nine hundred thirty-one".