115215620 has 96 divisors (see below), whose sum is σ = 278570880. Its totient is φ = 39674880.

The previous prime is 115215589. The next prime is 115215629. The reversal of 115215620 is 26512511.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (115215629) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 409880 + ... + 410160.

It is an arithmetic number, because the mean of its divisors is an integer number (2901780).

Almost surely, 2^115215620 is an apocalyptic number.

115215620 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 115215620, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (139285440).

115215620 is an abundant number, since it is smaller than the sum of its proper divisors (163355260).

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

115215620 is a wasteful number, since it uses less digits than its factorization.

115215620 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 405 (or 403 counting only the distinct ones).

The product of its (nonzero) digits is 600, while the sum is 23.

The square root of 115215620 is about 10733.8539211226. The cubic root of 115215620 is about 486.5981503175.

The spelling of 115215620 in words is "one hundred fifteen million, two hundred fifteen thousand, six hundred twenty".