56635531 has 2 divisors, whose sum is σ = 56635532. Its totient is φ = 56635530.

The previous prime is 56635519. The next prime is 56635541. The reversal of 56635531 is 13553665.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 56635531 - 2¹¹ = 56633483 is a prime.

It is a super-2 number, since 2×56635531² = 6415166743303922, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (56635541) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28317765 + 28317766.

It is an arithmetic number, because the mean of its divisors is an integer number (28317766).

Almost surely, 2^56635531 is an apocalyptic number.

56635531 is a deficient number, since it is larger than the sum of its proper divisors (1).

56635531 is an equidigital number, since it uses as much as digits as its factorization.

56635531 is an evil number, because the sum of its binary digits is even.

The product of its digits is 40500, while the sum is 34.

The square root of 56635531 is about 7525.6581771962. The cubic root of 56635531 is about 384.0280899410.

The spelling of 56635531 in words is "fifty-six million, six hundred thirty-five thousand, five hundred thirty-one".