56031138 has 24 divisors (see below), whose sum is σ = 121575168. Its totient is φ = 18650232.

The previous prime is 56031071. The next prime is 56031169. The reversal of 56031138 is 83113065.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 13731 + ... + 17337.

It is an arithmetic number, because the mean of its divisors is an integer number (5065632).

Almost surely, 2^56031138 is an apocalyptic number.

56031138 is an abundant number, since it is smaller than the sum of its proper divisors (65544030).

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

56031138 is a wasteful number, since it uses less digits than its factorization.

56031138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4478 (or 4475 counting only the distinct ones).

The product of its (nonzero) digits is 2160, while the sum is 27.

The square root of 56031138 is about 7485.3949795585. The cubic root of 56031138 is about 382.6571339527.

It can be divided in two parts, 56031 and 138, that multiplied together give a triangular number (7732278 = T₃₉₃₂).

The spelling of 56031138 in words is "fifty-six million, thirty-one thousand, one hundred thirty-eight".