56500915531 has 2 divisors, whose sum is σ = 56500915532. Its totient is φ = 56500915530.

The previous prime is 56500915517. The next prime is 56500915547. The reversal of 56500915531 is 13551900565.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 56500915531 - 2¹³ = 56500907339 is a prime.

It is a super-2 number, since 2×56500915531² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (56500915501) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28250457765 + 28250457766.

It is an arithmetic number, because the mean of its divisors is an integer number (28250457766).

Almost surely, 2^56500915531 is an apocalyptic number.

56500915531 is a deficient number, since it is larger than the sum of its proper divisors (1).

56500915531 is an equidigital number, since it uses as much as digits as its factorization.

56500915531 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 101250, while the sum is 40.

The spelling of 56500915531 in words is "fifty-six billion, five hundred million, nine hundred fifteen thousand, five hundred thirty-one".