115921615 has 8 divisors (see below), whose sum is σ = 140337648. Its totient is φ = 91916160.

The previous prime is 115921601. The next prime is 115921621. The reversal of 115921615 is 516129511.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 115921615 - 2⁵ = 115921583 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 102021 + ... + 103150.

It is an arithmetic number, because the mean of its divisors is an integer number (17542206).

Almost surely, 2^115921615 is an apocalyptic number.

115921615 is a deficient number, since it is larger than the sum of its proper divisors (24416033).

115921615 is a wasteful number, since it uses less digits than its factorization.

115921615 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 205289.

The product of its digits is 2700, while the sum is 31.

The square root of 115921615 is about 10766.6900670540. The cubic root of 115921615 is about 487.5900197559.

The spelling of 115921615 in words is "one hundred fifteen million, nine hundred twenty-one thousand, six hundred fifteen".