115161515 has 48 divisors (see below), whose sum is σ = 167640192. Its totient is φ = 75672576.

The previous prime is 115161493. The next prime is 115161521. The reversal of 115161515 is 515161511.

It is not a de Polignac number, because 115161515 - 2⁸ = 115161259 is a prime.

It is a Duffinian number.

It is an unprimeable number.

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 47 ways as a sum of consecutive naturals, for example, 840527 + ... + 840663.

It is an arithmetic number, because the mean of its divisors is an integer number (3492504).

Almost surely, 2^115161515 is an apocalyptic number.

115161515 is a deficient number, since it is larger than the sum of its proper divisors (52478677).

115161515 is a wasteful number, since it uses less digits than its factorization.

115161515 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 276 (or 269 counting only the distinct ones).

The product of its digits is 750, while the sum is 26.

The square root of 115161515 is about 10731.3333281564. Note that the first 4 decimals coincide. The cubic root of 115161515 is about 486.5219699203.

It can be divided in two parts, 11516 and 1515, that added together give a palindrome (13031).

The spelling of 115161515 in words is "one hundred fifteen million, one hundred sixty-one thousand, five hundred fifteen".