56511115 has 12 divisors (see below), whose sum is σ = 70862832. Its totient is φ = 43181600.

The previous prime is 56511113. The next prime is 56511139. The reversal of 56511115 is 51111565.

It is not a de Polignac number, because 56511115 - 2¹ = 56511113 is a prime.

It is a super-2 number, since 2×56511115² = 6387012237086450, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 56511115.

It is not an unprimeable number, because it can be changed into a prime (56511113) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 80265 + ... + 80965.

It is an arithmetic number, because the mean of its divisors is an integer number (5905236).

Almost surely, 2^56511115 is an apocalyptic number.

56511115 is a deficient number, since it is larger than the sum of its proper divisors (14351717).

56511115 is an frugal number, since it uses more digits than its factorization.

56511115 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1430 (or 729 counting only the distinct ones).

The product of its digits is 750, while the sum is 25.

The square root of 56511115 is about 7517.3875116293. The cubic root of 56511115 is about 383.7466749138.

The spelling of 56511115 in words is "fifty-six million, five hundred eleven thousand, one hundred fifteen".