56916831 has 16 divisors (see below), whose sum is σ = 76992768. Its totient is φ = 37396800.

The previous prime is 56916823. The next prime is 56916851. The reversal of 56916831 is 13861965.

It is not a de Polignac number, because 56916831 - 2³ = 56916823 is a prime.

It is a super-2 number, since 2×56916831² = 6479051302165122, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 56916831.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (56916851) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 89886 + ... + 90516.

It is an arithmetic number, because the mean of its divisors is an integer number (4812048).

Almost surely, 2^56916831 is an apocalyptic number.

56916831 is a deficient number, since it is larger than the sum of its proper divisors (20075937).

56916831 is a wasteful number, since it uses less digits than its factorization.

56916831 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1022.

The product of its digits is 38880, while the sum is 39.

The square root of 56916831 is about 7544.3244230348. The cubic root of 56916831 is about 384.6628430740.

The spelling of 56916831 in words is "fifty-six million, nine hundred sixteen thousand, eight hundred thirty-one".