56563731 has 32 divisors (see below), whose sum is σ = 96698880. Its totient is φ = 32008608.

The previous prime is 56563729. The next prime is 56563733. The reversal of 56563731 is 13736565.

It is a happy number.

56563731 is a `hidden beast` number, since 565 + 63 + 7 + 31 = 666.

56563731 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (56563729) and next prime (56563733).

It is not a de Polignac number, because 56563731 - 2¹ = 56563729 is a prime.

It is a super-2 number, since 2×56563731² = 6398911329280722, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (56563733) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 18825 + ... + 21621.

It is an arithmetic number, because the mean of its divisors is an integer number (3021840).

Almost surely, 2^56563731 is an apocalyptic number.

56563731 is a deficient number, since it is larger than the sum of its proper divisors (40135149).

56563731 is a wasteful number, since it uses less digits than its factorization.

56563731 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2920 (or 2914 counting only the distinct ones).

The product of its digits is 56700, while the sum is 36.

The square root of 56563731 is about 7520.8863174496. The cubic root of 56563731 is about 383.8657367526.

The spelling of 56563731 in words is "fifty-six million, five hundred sixty-three thousand, seven hundred thirty-one".