56731564 has 12 divisors (see below), whose sum is σ = 99462384. Its totient is φ = 28313744.

The previous prime is 56731553. The next prime is 56731573. The reversal of 56731564 is 46513765.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10504 + ... + 14959.

It is an arithmetic number, because the mean of its divisors is an integer number (8288532).

Almost surely, 2^56731564 is an apocalyptic number.

It is an amenable number.

56731564 is a deficient number, since it is larger than the sum of its proper divisors (42730820).

56731564 is a wasteful number, since it uses less digits than its factorization.

56731564 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26024 (or 26022 counting only the distinct ones).

The product of its digits is 75600, while the sum is 37.

The square root of 56731564 is about 7532.0358469673. The cubic root of 56731564 is about 384.2450241041.

It can be divided in two parts, 567 and 31564, that added together give a triangular number (32131 = T₂₅₃).

The spelling of 56731564 in words is "fifty-six million, seven hundred thirty-one thousand, five hundred sixty-four".