56047591 has 2 divisors, whose sum is σ = 56047592. Its totient is φ = 56047590.

The previous prime is 56047583. The next prime is 56047601. The reversal of 56047591 is 19574065.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 56047591 - 2³ = 56047583 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 56047591.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (56047501) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28023795 + 28023796.

It is an arithmetic number, because the mean of its divisors is an integer number (28023796).

Almost surely, 2^56047591 is an apocalyptic number.

56047591 is a deficient number, since it is larger than the sum of its proper divisors (1).

56047591 is an equidigital number, since it uses as much as digits as its factorization.

56047591 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 37800, while the sum is 37.

The square root of 56047591 is about 7486.4939056944. The cubic root of 56047591 is about 382.6945848054.

The spelling of 56047591 in words is "fifty-six million, forty-seven thousand, five hundred ninety-one".