56566571 has 2 divisors, whose sum is σ = 56566572. Its totient is φ = 56566570.

The previous prime is 56566567. The next prime is 56566577. The reversal of 56566571 is 17566565.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 56566571 - 2² = 56566567 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (56566577) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28283285 + 28283286.

It is an arithmetic number, because the mean of its divisors is an integer number (28283286).

Almost surely, 2^56566571 is an apocalyptic number.

56566571 is a deficient number, since it is larger than the sum of its proper divisors (1).

56566571 is an equidigital number, since it uses as much as digits as its factorization.

56566571 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 189000, while the sum is 41.

The square root of 56566571 is about 7521.0751226138. The cubic root of 56566571 is about 383.8721611310.

The spelling of 56566571 in words is "fifty-six million, five hundred sixty-six thousand, five hundred seventy-one".