56885531 has 2 divisors, whose sum is σ = 56885532. Its totient is φ = 56885530.

The previous prime is 56885513. The next prime is 56885537. The reversal of 56885531 is 13558865.

Together with previous prime (56885513) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-56885531 is a prime.

It is a super-2 number, since 2×56885531² = 6471927274303922, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (56885537) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28442765 + 28442766.

It is an arithmetic number, because the mean of its divisors is an integer number (28442766).

Almost surely, 2^56885531 is an apocalyptic number.

56885531 is a deficient number, since it is larger than the sum of its proper divisors (1).

56885531 is an equidigital number, since it uses as much as digits as its factorization.

56885531 is an evil number, because the sum of its binary digits is even.

The product of its digits is 144000, while the sum is 41.

The square root of 56885531 is about 7542.2497306838. The cubic root of 56885531 is about 384.5923182136.

The spelling of 56885531 in words is "fifty-six million, eight hundred eighty-five thousand, five hundred thirty-one".