56435591 has 2 divisors, whose sum is σ = 56435592. Its totient is φ = 56435590.

The previous prime is 56435581. The next prime is 56435611. The reversal of 56435591 is 19553465.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-56435591 is a prime.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (56435501) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28217795 + 28217796.

It is an arithmetic number, because the mean of its divisors is an integer number (28217796).

Almost surely, 2^56435591 is an apocalyptic number.

56435591 is a deficient number, since it is larger than the sum of its proper divisors (1).

56435591 is an equidigital number, since it uses as much as digits as its factorization.

56435591 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 56435591 is about 7512.3625444996. The cubic root of 56435591 is about 383.5756465863.

The spelling of 56435591 in words is "fifty-six million, four hundred thirty-five thousand, five hundred ninety-one".