56511577 has 2 divisors, whose sum is σ = 56511578. Its totient is φ = 56511576.

The previous prime is 56511551. The next prime is 56511607. The reversal of 56511577 is 77511565.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 32901696 + 23609881 = 5736^2 + 4859^2 .

It is a cyclic number.

It is not a de Polignac number, because 56511577 - 2⁷ = 56511449 is a prime.

It is not a weakly prime, because it can be changed into another prime (56517577) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28255788 + 28255789.

It is an arithmetic number, because the mean of its divisors is an integer number (28255789).

Almost surely, 2^56511577 is an apocalyptic number.

It is an amenable number.

56511577 is a deficient number, since it is larger than the sum of its proper divisors (1).

56511577 is an equidigital number, since it uses as much as digits as its factorization.

56511577 is an evil number, because the sum of its binary digits is even.

The product of its digits is 36750, while the sum is 37.

The square root of 56511577 is about 7517.4182403269. The cubic root of 56511577 is about 383.7477206696.

The spelling of 56511577 in words is "fifty-six million, five hundred eleven thousand, five hundred seventy-seven".