56506631 has 2 divisors, whose sum is σ = 56506632. Its totient is φ = 56506630.

The previous prime is 56506613. The next prime is 56506669. The reversal of 56506631 is 13660565.

Together with previous prime (56506613) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 56506631 - 2¹⁰ = 56505607 is a prime.

It is a super-2 number, since 2×56506631² = 6385998693940322, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (56506031) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28253315 + 28253316.

It is an arithmetic number, because the mean of its divisors is an integer number (28253316).

Almost surely, 2^56506631 is an apocalyptic number.

56506631 is a deficient number, since it is larger than the sum of its proper divisors (1).

56506631 is an equidigital number, since it uses as much as digits as its factorization.

56506631 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 16200, while the sum is 32.

The square root of 56506631 is about 7517.0892638042. The cubic root of 56506631 is about 383.7365249011.

The spelling of 56506631 in words is "fifty-six million, five hundred six thousand, six hundred thirty-one".