56915863 has 2 divisors, whose sum is σ = 56915864. Its totient is φ = 56915862.

The previous prime is 56915821. The next prime is 56915909. The reversal of 56915863 is 36851965.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 56915863 - 2¹³ = 56907671 is a prime.

It is a super-2 number, since 2×56915863² = 6478830922069538, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (56915063) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28457931 + 28457932.

It is an arithmetic number, because the mean of its divisors is an integer number (28457932).

Almost surely, 2^56915863 is an apocalyptic number.

56915863 is a deficient number, since it is larger than the sum of its proper divisors (1).

56915863 is an equidigital number, since it uses as much as digits as its factorization.

56915863 is an evil number, because the sum of its binary digits is even.

The product of its digits is 194400, while the sum is 43.

The square root of 56915863 is about 7544.2602685750. The cubic root of 56915863 is about 384.6606623732.

It can be divided in two parts, 5691 and 5863, that multiplied together give a palindrome (33366333).

The spelling of 56915863 in words is "fifty-six million, nine hundred fifteen thousand, eight hundred sixty-three".