56628631 has 2 divisors, whose sum is σ = 56628632. Its totient is φ = 56628630.

The previous prime is 56628629. The next prime is 56628643. The reversal of 56628631 is 13682665.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 56628631 - 2¹ = 56628629 is a prime.

It is a super-2 number, since 2×56628631² = 6413603697868322, which contains 22 as substring.

Together with 56628629, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (56628031) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28314315 + 28314316.

It is an arithmetic number, because the mean of its divisors is an integer number (28314316).

Almost surely, 2^56628631 is an apocalyptic number.

56628631 is a deficient number, since it is larger than the sum of its proper divisors (1).

56628631 is an equidigital number, since it uses as much as digits as its factorization.

56628631 is an evil number, because the sum of its binary digits is even.

The product of its digits is 51840, while the sum is 37.

The square root of 56628631 is about 7525.1997315686. The cubic root of 56628631 is about 384.0124937160.

The spelling of 56628631 in words is "fifty-six million, six hundred twenty-eight thousand, six hundred thirty-one".