115621530 has 32 divisors (see below), whose sum is σ = 278251200. Its totient is φ = 30748032.

The previous prime is 115621523. The next prime is 115621531. The reversal of 115621530 is 35126511.

It is a self number, because there is not a number n which added to its sum of digits gives 115621530.

It is not an unprimeable number, because it can be changed into a prime (115621531) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6286 + ... + 16454.

It is an arithmetic number, because the mean of its divisors is an integer number (8695350).

Almost surely, 2^115621530 is an apocalyptic number.

115621530 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

115621530 is an abundant number, since it is smaller than the sum of its proper divisors (162629670).

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

115621530 is a wasteful number, since it uses less digits than its factorization.

115621530 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10558.

The product of its (nonzero) digits is 900, while the sum is 24.

The square root of 115621530 is about 10752.7452308701. The cubic root of 115621530 is about 487.1689165514.

The spelling of 115621530 in words is "one hundred fifteen million, six hundred twenty-one thousand, five hundred thirty".