115515560 has 32 divisors (see below), whose sum is σ = 261428040. Its totient is φ = 45936384.

The previous prime is 115515553. The next prime is 115515581. The reversal of 115515560 is 65515511.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 90973444 + 24542116 = 9538^2 + 4954^2 .

It is a super-2 number, since 2×115515560² = 26687689204227200, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1427 + ... + 15266.

Almost surely, 2^115515560 is an apocalyptic number.

115515560 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

115515560 is an abundant number, since it is smaller than the sum of its proper divisors (145912480).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

115515560 is a wasteful number, since it uses less digits than its factorization.

115515560 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16877 (or 16873 counting only the distinct ones).

The product of its (nonzero) digits is 3750, while the sum is 29.

The square root of 115515560 is about 10747.8165224384. The cubic root of 115515560 is about 487.0200369265.

The spelling of 115515560 in words is "one hundred fifteen million, five hundred fifteen thousand, five hundred sixty".