56631172 has 72 divisors (see below), whose sum is σ = 118728960. Its totient is φ = 23405760.

The previous prime is 56631167. The next prime is 56631187. The reversal of 56631172 is 27113665.

It is a Harshad number since it is a multiple of its sum of digits (31).

Its product of digits (7560) is a multiple of the sum of its prime divisors (108).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1316983 + ... + 1317025.

Almost surely, 2^56631172 is an apocalyptic number.

56631172 is a gapful number since it is divisible by the number (52) formed by its first and last digit.

It is an amenable number.

56631172 is an abundant number, since it is smaller than the sum of its proper divisors (62097788).

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

56631172 is a wasteful number, since it uses less digits than its factorization.

56631172 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 153 (or 108 counting only the distinct ones).

The product of its digits is 7560, while the sum is 31.

The square root of 56631172 is about 7525.3685624028. The cubic root of 56631172 is about 384.0182373428.

The spelling of 56631172 in words is "fifty-six million, six hundred thirty-one thousand, one hundred seventy-two".