56558831 has 4 divisors (see below), whose sum is σ = 64638672. Its totient is φ = 48478992.

The previous prime is 56558819. The next prime is 56558833. The reversal of 56558831 is 13885565.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 13885565 = 5 ⋅2777113.

It is a cyclic number.

It is not a de Polignac number, because 56558831 - 2⁶ = 56558767 is a prime.

It is a super-2 number, since 2×56558831² = 6397802728173122, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (56558833) 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, 4039910 + ... + 4039923.

It is an arithmetic number, because the mean of its divisors is an integer number (16159668).

Almost surely, 2^56558831 is an apocalyptic number.

56558831 is a deficient number, since it is larger than the sum of its proper divisors (8079841).

56558831 is an equidigital number, since it uses as much as digits as its factorization.

56558831 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8079840.

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

The square root of 56558831 is about 7520.5605509164. The cubic root of 56558831 is about 383.8546519320.

The spelling of 56558831 in words is "fifty-six million, five hundred fifty-eight thousand, eight hundred thirty-one".