56931577 has 2 divisors, whose sum is σ = 56931578. Its totient is φ = 56931576.

The previous prime is 56931571. The next prime is 56931599. The reversal of 56931577 is 77513965.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 38303721 + 18627856 = 6189^2 + 4316^2 .

It is a cyclic number.

It is not a de Polignac number, because 56931577 - 2¹⁹ = 56407289 is a prime.

It is a nialpdrome in base 13.

It is not a weakly prime, because it can be changed into another prime (56931571) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28465788 + 28465789.

It is an arithmetic number, because the mean of its divisors is an integer number (28465789).

Almost surely, 2^56931577 is an apocalyptic number.

It is an amenable number.

56931577 is a deficient number, since it is larger than the sum of its proper divisors (1).

56931577 is an equidigital number, since it uses as much as digits as its factorization.

56931577 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 198450, while the sum is 43.

The square root of 56931577 is about 7545.3016506963. The cubic root of 56931577 is about 384.6960596604.

The spelling of 56931577 in words is "fifty-six million, nine hundred thirty-one thousand, five hundred seventy-seven".