56131816 has 16 divisors (see below), whose sum is σ = 113343300. Its totient is φ = 25906944.

The previous prime is 56131811. The next prime is 56131847. The reversal of 56131816 is 61813165.

It can be written as a sum of positive squares in 2 ways, for example, as 55442916 + 688900 = 7446^2 + 830^2 .

It is not an unprimeable number, because it can be changed into a prime (56131811) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 269761 + ... + 269968.

Almost surely, 2^56131816 is an apocalyptic number.

It is an amenable number.

56131816 is an abundant number, since it is smaller than the sum of its proper divisors (57211484).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

56131816 is a wasteful number, since it uses less digits than its factorization.

56131816 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 539748 (or 539744 counting only the distinct ones).

The product of its digits is 4320, while the sum is 31.

The square root of 56131816 is about 7492.1169238073. The cubic root of 56131816 is about 382.8861857801.

The spelling of 56131816 in words is "fifty-six million, one hundred thirty-one thousand, eight hundred sixteen".