56515859 has 2 divisors, whose sum is σ = 56515860. Its totient is φ = 56515858.

The previous prime is 56515847. The next prime is 56515897. The reversal of 56515859 is 95851565.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 56515859 - 2⁴ = 56515843 is a prime.

It is not a weakly prime, because it can be changed into another prime (56515159) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28257929 + 28257930.

It is an arithmetic number, because the mean of its divisors is an integer number (28257930).

Almost surely, 2^56515859 is an apocalyptic number.

56515859 is a deficient number, since it is larger than the sum of its proper divisors (1).

56515859 is an equidigital number, since it uses as much as digits as its factorization.

56515859 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 270000, while the sum is 44.

The square root of 56515859 is about 7517.7030401579. The cubic root of 56515859 is about 383.7574128798.

The spelling of 56515859 in words is "fifty-six million, five hundred fifteen thousand, eight hundred fifty-nine".