56345591 has 2 divisors, whose sum is σ = 56345592. Its totient is φ = 56345590.

The previous prime is 56345567. The next prime is 56345617. The reversal of 56345591 is 19554365.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 56345591 - 2²² = 52151287 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (56345501) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28172795 + 28172796.

It is an arithmetic number, because the mean of its divisors is an integer number (28172796).

Almost surely, 2^56345591 is an apocalyptic number.

56345591 is a deficient number, since it is larger than the sum of its proper divisors (1).

56345591 is an equidigital number, since it uses as much as digits as its factorization.

56345591 is an evil number, because the sum of its binary digits is even.

The product of its digits is 81000, while the sum is 38.

The square root of 56345591 is about 7506.3700281827. The cubic root of 56345591 is about 383.3716371722.

The spelling of 56345591 in words is "fifty-six million, three hundred forty-five thousand, five hundred ninety-one".