56885813 has 2 divisors, whose sum is σ = 56885814. Its totient is φ = 56885812.

The previous prime is 56885797. The next prime is 56885821. The reversal of 56885813 is 31858865.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 54140164 + 2745649 = 7358^2 + 1657^2 .

It is a cyclic number.

It is not a de Polignac number, because 56885813 - 2⁴ = 56885797 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (56885113) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28442906 + 28442907.

It is an arithmetic number, because the mean of its divisors is an integer number (28442907).

Almost surely, 2^56885813 is an apocalyptic number.

It is an amenable number.

56885813 is a deficient number, since it is larger than the sum of its proper divisors (1).

56885813 is an equidigital number, since it uses as much as digits as its factorization.

56885813 is an evil number, because the sum of its binary digits is even.

The product of its digits is 230400, while the sum is 44.

The square root of 56885813 is about 7542.2684253479. The cubic root of 56885813 is about 384.5929537288.

The spelling of 56885813 in words is "fifty-six million, eight hundred eighty-five thousand, eight hundred thirteen".