56807731 has 2 divisors, whose sum is σ = 56807732. Its totient is φ = 56807730.

The previous prime is 56807713. The next prime is 56807743. The reversal of 56807731 is 13770865.

56807731 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

Together with previous prime (56807713) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 56807731 - 2¹⁹ = 56283443 is a prime.

It is a super-2 number, since 2×56807731² = 6454236602736722, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (56807711) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28403865 + 28403866.

It is an arithmetic number, because the mean of its divisors is an integer number (28403866).

Almost surely, 2^56807731 is an apocalyptic number.

56807731 is a deficient number, since it is larger than the sum of its proper divisors (1).

56807731 is an equidigital number, since it uses as much as digits as its factorization.

56807731 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 35280, while the sum is 37.

The square root of 56807731 is about 7537.0903537108. The cubic root of 56807731 is about 384.4169078593.

The spelling of 56807731 in words is "fifty-six million, eight hundred seven thousand, seven hundred thirty-one".