56556623 has 2 divisors, whose sum is σ = 56556624. Its totient is φ = 56556622.

The previous prime is 56556607. The next prime is 56556629. The reversal of 56556623 is 32665565.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 56556623 - 2⁴ = 56556607 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (56556629) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28278311 + 28278312.

It is an arithmetic number, because the mean of its divisors is an integer number (28278312).

Almost surely, 2^56556623 is an apocalyptic number.

56556623 is a deficient number, since it is larger than the sum of its proper divisors (1).

56556623 is an equidigital number, since it uses as much as digits as its factorization.

56556623 is an evil number, because the sum of its binary digits is even.

The product of its digits is 162000, while the sum is 38.

The square root of 56556623 is about 7520.4137519155. The cubic root of 56556623 is about 383.8496567669.

The spelling of 56556623 in words is "fifty-six million, five hundred fifty-six thousand, six hundred twenty-three".