115819915 has 16 divisors (see below), whose sum is σ = 147607200. Its totient is φ = 86994432.

The previous prime is 115819901. The next prime is 115819933. The reversal of 115819915 is 519918511.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 115819915 - 2¹³ = 115811723 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5341 + ... + 16129.

It is an arithmetic number, because the mean of its divisors is an integer number (9225450).

Almost surely, 2^115819915 is an apocalyptic number.

115819915 is a deficient number, since it is larger than the sum of its proper divisors (31787285).

115819915 is a wasteful number, since it uses less digits than its factorization.

115819915 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10926.

The product of its digits is 16200, while the sum is 40.

The square root of 115819915 is about 10761.9661307774. The cubic root of 115819915 is about 487.4473877037.

The spelling of 115819915 in words is "one hundred fifteen million, eight hundred nineteen thousand, nine hundred fifteen".