115213915 has 4 divisors (see below), whose sum is σ = 138256704. Its totient is φ = 92171128.

The previous prime is 115213909. The next prime is 115213919. The reversal of 115213915 is 519312511.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 115213915 - 2⁵ = 115213883 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (115213919) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11521387 + ... + 11521396.

It is an arithmetic number, because the mean of its divisors is an integer number (34564176).

Almost surely, 2^115213915 is an apocalyptic number.

115213915 is a deficient number, since it is larger than the sum of its proper divisors (23042789).

115213915 is an equidigital number, since it uses as much as digits as its factorization.

115213915 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23042788.

The product of its digits is 1350, while the sum is 28.

The square root of 115213915 is about 10733.7744992151. The cubic root of 115213915 is about 486.5957500240.

The spelling of 115213915 in words is "one hundred fifteen million, two hundred thirteen thousand, nine hundred fifteen".