115197915 has 32 divisors (see below), whose sum is σ = 219810816. Its totient is φ = 50371200.

The previous prime is 115197911. The next prime is 115197919. The reversal of 115197915 is 519791511.

It is an interprime number because it is at equal distance from previous prime (115197911) and next prime (115197919).

It is not a de Polignac number, because 115197915 - 2² = 115197911 is a prime.

It is a Smith number, since the sum of its digits (39) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (115197911) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 21436 + ... + 26265.

It is an arithmetic number, because the mean of its divisors is an integer number (6869088).

Almost surely, 2^115197915 is an apocalyptic number.

115197915 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

115197915 is a deficient number, since it is larger than the sum of its proper divisors (104612901).

115197915 is a wasteful number, since it uses less digits than its factorization.

115197915 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 47739.

The product of its digits is 14175, while the sum is 39.

The square root of 115197915 is about 10733.0291623567. The cubic root of 115197915 is about 486.5732241209.

The spelling of 115197915 in words is "one hundred fifteen million, one hundred ninety-seven thousand, nine hundred fifteen".