56818631 has 2 divisors, whose sum is σ = 56818632. Its totient is φ = 56818630.

The previous prime is 56818603. The next prime is 56818637. The reversal of 56818631 is 13681865.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 56818631 - 2¹⁴ = 56802247 is a prime.

It is a super-2 number, since 2×56818631² = 6456713657428322, which contains 22 as substring.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (56818637) 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, 28409315 + 28409316.

It is an arithmetic number, because the mean of its divisors is an integer number (28409316).

Almost surely, 2^56818631 is an apocalyptic number.

56818631 is a deficient number, since it is larger than the sum of its proper divisors (1).

56818631 is an equidigital number, since it uses as much as digits as its factorization.

56818631 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 34560, while the sum is 38.

The square root of 56818631 is about 7537.8134097363. The cubic root of 56818631 is about 384.4414929892.

The spelling of 56818631 in words is "fifty-six million, eight hundred eighteen thousand, six hundred thirty-one".