57531656 has 48 divisors (see below), whose sum is σ = 133516800. Its totient is φ = 22756032.

The previous prime is 57531641. The next prime is 57531697. The reversal of 57531656 is 65613575.

It is a congruent number.

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, 6425 + ... + 12503.

It is an arithmetic number, because the mean of its divisors is an integer number (2781600).

Almost surely, 2^57531656 is an apocalyptic number.

57531656 is a gapful number since it is divisible by the number (56) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 57531656, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (66758400).

57531656 is an abundant number, since it is smaller than the sum of its proper divisors (75985144).

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

57531656 is a wasteful number, since it uses less digits than its factorization.

57531656 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6118 (or 6101 counting only the distinct ones).

The product of its digits is 94500, while the sum is 38.

The square root of 57531656 is about 7584.9624916673. The cubic root of 57531656 is about 386.0429493942.

The spelling of 57531656 in words is "fifty-seven million, five hundred thirty-one thousand, six hundred fifty-six".