56575516931 has 2 divisors, whose sum is σ = 56575516932. Its totient is φ = 56575516930.

The previous prime is 56575516819. The next prime is 56575516969. The reversal of 56575516931 is 13961557565.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 56575516931 - 2¹⁴ = 56575500547 is a prime.

It is a super-2 number, since 2×56575516931² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (56575516331) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28287758465 + 28287758466.

It is an arithmetic number, because the mean of its divisors is an integer number (28287758466).

Almost surely, 2^56575516931 is an apocalyptic number.

56575516931 is a deficient number, since it is larger than the sum of its proper divisors (1).

56575516931 is an equidigital number, since it uses as much as digits as its factorization.

56575516931 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4252500, while the sum is 53.

The spelling of 56575516931 in words is "fifty-six billion, five hundred seventy-five million, five hundred sixteen thousand, nine hundred thirty-one".