56517859 has 4 divisors (see below), whose sum is σ = 56566120. Its totient is φ = 56469600.

The previous prime is 56517847. The next prime is 56517871. The reversal of 56517859 is 95871565.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (56517847) and next prime (56517871).

It is a cyclic number.

It is not a de Polignac number, because 56517859 - 2¹⁹ = 55993571 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (56517899) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 22329 + ... + 24730.

It is an arithmetic number, because the mean of its divisors is an integer number (14141530).

Almost surely, 2^56517859 is an apocalyptic number.

56517859 is a deficient number, since it is larger than the sum of its proper divisors (48261).

56517859 is a wasteful number, since it uses less digits than its factorization.

56517859 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48260.

The product of its digits is 378000, while the sum is 46.

The square root of 56517859 is about 7517.8360583349. The cubic root of 56517859 is about 383.7619396668.

The spelling of 56517859 in words is "fifty-six million, five hundred seventeen thousand, eight hundred fifty-nine".