115563915 has 20 divisors (see below), whose sum is σ = 207159744. Its totient is φ = 61633872.

The previous prime is 115563907. The next prime is 115563989. The reversal of 115563915 is 519365511.

115563915 is a `hidden beast` number, since 1 + 1 + 5 + 5 + 639 + 15 = 666.

It is not a de Polignac number, because 115563915 - 2³ = 115563907 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 115563915.

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 142267 + ... + 143076.

Almost surely, 2^115563915 is an apocalyptic number.

115563915 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

115563915 is a deficient number, since it is larger than the sum of its proper divisors (91595829).

115563915 is an equidigital number, since it uses as much as digits as its factorization.

115563915 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 285360 (or 285351 counting only the distinct ones).

The product of its digits is 20250, while the sum is 36.

The square root of 115563915 is about 10750.0658137520. The cubic root of 115563915 is about 487.0879832379.

The spelling of 115563915 in words is "one hundred fifteen million, five hundred sixty-three thousand, nine hundred fifteen".