56515871 has 8 divisors (see below), whose sum is σ = 60273360. Its totient is φ = 52806528.

The previous prime is 56515859. The next prime is 56515897. The reversal of 56515871 is 17851565.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 56515871 - 2¹⁰ = 56514847 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (56515471) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9596 + ... + 14321.

It is an arithmetic number, because the mean of its divisors is an integer number (7534170).

Almost surely, 2^56515871 is an apocalyptic number.

56515871 is a deficient number, since it is larger than the sum of its proper divisors (3757489).

56515871 is a wasteful number, since it uses less digits than its factorization.

56515871 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24073.

The product of its digits is 42000, while the sum is 38.

The square root of 56515871 is about 7517.7038382740. The cubic root of 56515871 is about 383.7574400408.

The spelling of 56515871 in words is "fifty-six million, five hundred fifteen thousand, eight hundred seventy-one".