115921500 has 96 divisors (see below), whose sum is σ = 341140800. Its totient is φ = 30585600.

The previous prime is 115921483. The next prime is 115921517. The reversal of 115921500 is 5129511.

It is an interprime number because it is at equal distance from previous prime (115921483) and next prime (115921517).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 163146 + ... + 163854.

It is an arithmetic number, because the mean of its divisors is an integer number (3553550).

Almost surely, 2^115921500 is an apocalyptic number.

115921500 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 115921500, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (170570400).

115921500 is an abundant number, since it is smaller than the sum of its proper divisors (225219300).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

115921500 is a wasteful number, since it uses less digits than its factorization.

115921500 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 840 (or 828 counting only the distinct ones).

The product of its (nonzero) digits is 450, while the sum is 24.

The square root of 115921500 is about 10766.6847265070. The cubic root of 115921500 is about 487.5898585180.

The spelling of 115921500 in words is "one hundred fifteen million, nine hundred twenty-one thousand, five hundred".