56357239 has 2 divisors, whose sum is σ = 56357240. Its totient is φ = 56357238.

The previous prime is 56357209. The next prime is 56357263. The reversal of 56357239 is 93275365.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 56357239 - 2⁵ = 56357207 is a prime.

It is a super-2 number, since 2×56357239² = 6352276775406242, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (56357209) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28178619 + 28178620.

It is an arithmetic number, because the mean of its divisors is an integer number (28178620).

Almost surely, 2^56357239 is an apocalyptic number.

56357239 is a deficient number, since it is larger than the sum of its proper divisors (1).

56357239 is an equidigital number, since it uses as much as digits as its factorization.

56357239 is an evil number, because the sum of its binary digits is even.

The product of its digits is 170100, while the sum is 40.

The square root of 56357239 is about 7507.1458624433. The cubic root of 56357239 is about 383.3980527567.

The spelling of 56357239 in words is "fifty-six million, three hundred fifty-seven thousand, two hundred thirty-nine".