56721000931 has 8 divisors (see below), whose sum is σ = 64854015584. Its totient is φ = 48595489920.

The previous prime is 56721000911. The next prime is 56721000937. The reversal of 56721000931 is 13900012765.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 56721000931 - 2¹¹ = 56720998883 is a prime.

It is a super-2 number, since 2×56721000931² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (56721000937) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1859700 + ... + 1889953.

It is an arithmetic number, because the mean of its divisors is an integer number (8106751948).

Almost surely, 2^56721000931 is an apocalyptic number.

56721000931 is a deficient number, since it is larger than the sum of its proper divisors (8133014653).

56721000931 is a wasteful number, since it uses less digits than its factorization.

56721000931 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3751821.

The product of its (nonzero) digits is 11340, while the sum is 34.

The spelling of 56721000931 in words is "fifty-six billion, seven hundred twenty-one million, nine hundred thirty-one", and thus it is an aban number.