115717515 has 16 divisors (see below), whose sum is σ = 189454848. Its totient is φ = 60280416.

The previous prime is 115717507. The next prime is 115717517. The reversal of 115717515 is 515717511.

It is not a de Polignac number, because 115717515 - 2³ = 115717507 is a prime.

It is not an unprimeable number, because it can be changed into a prime (115717517) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 89059 + ... + 90348.

It is an arithmetic number, because the mean of its divisors is an integer number (11840928).

Almost surely, 2^115717515 is an apocalyptic number.

115717515 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

115717515 is a deficient number, since it is larger than the sum of its proper divisors (73737333).

115717515 is a wasteful number, since it uses less digits than its factorization.

115717515 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 179458.

The product of its digits is 6125, while the sum is 33.

The square root of 115717515 is about 10757.2075837552. The cubic root of 115717515 is about 487.3036895320.

The spelling of 115717515 in words is "one hundred fifteen million, seven hundred seventeen thousand, five hundred fifteen".