56915239 has 2 divisors, whose sum is σ = 56915240. Its totient is φ = 56915238.

The previous prime is 56915231. The next prime is 56915267. The reversal of 56915239 is 93251965.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 56915239 - 2³ = 56915231 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (56915231) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28457619 + 28457620.

It is an arithmetic number, because the mean of its divisors is an integer number (28457620).

Almost surely, 2^56915239 is an apocalyptic number.

56915239 is a deficient number, since it is larger than the sum of its proper divisors (1).

56915239 is an equidigital number, since it uses as much as digits as its factorization.

56915239 is an evil number, because the sum of its binary digits is even.

The product of its digits is 72900, while the sum is 40.

The square root of 56915239 is about 7544.2189125184. The cubic root of 56915239 is about 384.6592566190.

The spelling of 56915239 in words is "fifty-six million, nine hundred fifteen thousand, two hundred thirty-nine".