117815115 has 32 divisors (see below), whose sum is σ = 206841600. Its totient is φ = 56789120.

The previous prime is 117815111. The next prime is 117815119. The reversal of 117815115 is 511518711.

It is an interprime number because it is at equal distance from previous prime (117815111) and next prime (117815119).

It is not a de Polignac number, because 117815115 - 2² = 117815111 is a prime.

It is not an unprimeable number, because it can be changed into a prime (117815111) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 27541 + ... + 31529.

It is an arithmetic number, because the mean of its divisors is an integer number (6463800).

Almost surely, 2^117815115 is an apocalyptic number.

117815115 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

117815115 is a deficient number, since it is larger than the sum of its proper divisors (89026485).

117815115 is a wasteful number, since it uses less digits than its factorization.

117815115 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4187.

The product of its digits is 1400, while the sum is 30.

The square root of 117815115 is about 10854.2671332522. The cubic root of 117815115 is about 490.2305107303.

The spelling of 117815115 in words is "one hundred seventeen million, eight hundred fifteen thousand, one hundred fifteen".