115511515 has 32 divisors (see below), whose sum is σ = 169827840. Its totient is φ = 73618944.

The previous prime is 115511503. The next prime is 115511531. The reversal of 115511515 is 515115511.

It is not a de Polignac number, because 115511515 - 2⁵ = 115511483 is a prime.

It is a nude number because it is divisible by every one of its digits.

It is a self number, because there is not a number n which added to its sum of digits gives 115511515.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 48216 + ... + 50554.

It is an arithmetic number, because the mean of its divisors is an integer number (5307120).

Almost surely, 2^115511515 is an apocalyptic number.

115511515 is a deficient number, since it is larger than the sum of its proper divisors (54316325).

115511515 is a wasteful number, since it uses less digits than its factorization.

115511515 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2451.

The product of its digits is 625, while the sum is 25.

The square root of 115511515 is about 10747.6283430346. The cubic root of 115511515 is about 487.0143522116.

The spelling of 115511515 in words is "one hundred fifteen million, five hundred eleven thousand, five hundred fifteen".