115561500 has 48 divisors (see below), whose sum is σ = 336519456. Its totient is φ = 30816000.

The previous prime is 115561483. The next prime is 115561513. The reversal of 115561500 is 5165511.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 37021 + ... + 40020.

It is an arithmetic number, because the mean of its divisors is an integer number (7010822).

Almost surely, 2^115561500 is an apocalyptic number.

115561500 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

115561500 is an abundant number, since it is smaller than the sum of its proper divisors (220957956).

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

115561500 is a wasteful number, since it uses less digits than its factorization.

115561500 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 77063 (or 77051 counting only the distinct ones).

The product of its (nonzero) digits is 750, while the sum is 24.

The square root of 115561500 is about 10749.9534882715. The cubic root of 115561500 is about 487.0845902362.

The spelling of 115561500 in words is "one hundred fifteen million, five hundred sixty-one thousand, five hundred".