56605831 has 2 divisors, whose sum is σ = 56605832. Its totient is φ = 56605830.

The previous prime is 56605817. The next prime is 56605837. The reversal of 56605831 is 13850665.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 56605831 - 2⁵ = 56605799 is a prime.

It is a super-2 number, since 2×56605831² = 6408440206401122, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (56605837) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28302915 + 28302916.

It is an arithmetic number, because the mean of its divisors is an integer number (28302916).

Almost surely, 2^56605831 is an apocalyptic number.

56605831 is a deficient number, since it is larger than the sum of its proper divisors (1).

56605831 is an equidigital number, since it uses as much as digits as its factorization.

56605831 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 21600, while the sum is 34.

The square root of 56605831 is about 7523.6846690967. The cubic root of 56605831 is about 383.9609493528.

The spelling of 56605831 in words is "fifty-six million, six hundred five thousand, eight hundred thirty-one".