56815271831 has 8 divisors (see below), whose sum is σ = 57794538960. Its totient is φ = 55836548032.

The previous prime is 56815271827. The next prime is 56815271897. The reversal of 56815271831 is 13817251865.

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 56815271831 - 2² = 56815271827 is a prime.

It is a super-2 number, since 2×56815271831² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (56815201831) 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, 77981 + ... + 345993.

It is an arithmetic number, because the mean of its divisors is an integer number (7224317370).

Almost surely, 2^56815271831 is an apocalyptic number.

56815271831 is a deficient number, since it is larger than the sum of its proper divisors (979267129).

56815271831 is a wasteful number, since it uses less digits than its factorization.

56815271831 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 271665.

The product of its digits is 403200, while the sum is 47.

The spelling of 56815271831 in words is "fifty-six billion, eight hundred fifteen million, two hundred seventy-one thousand, eight hundred thirty-one".