56867831 has 2 divisors, whose sum is σ = 56867832. Its totient is φ = 56867830.

The previous prime is 56867821. The next prime is 56867843. The reversal of 56867831 is 13876865.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-56867831 is a prime.

It is a super-2 number, since 2×56867831² = 6467900405289122, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (56867821) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28433915 + 28433916.

It is an arithmetic number, because the mean of its divisors is an integer number (28433916).

Almost surely, 2^56867831 is an apocalyptic number.

56867831 is a deficient number, since it is larger than the sum of its proper divisors (1).

56867831 is an equidigital number, since it uses as much as digits as its factorization.

56867831 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 241920, while the sum is 44.

The square root of 56867831 is about 7541.0762494487. The cubic root of 56867831 is about 384.5524252914.

The spelling of 56867831 in words is "fifty-six million, eight hundred sixty-seven thousand, eight hundred thirty-one".