115157172 has 96 divisors (see below), whose sum is σ = 302448384. Its totient is φ = 33868800.

The previous prime is 115157153. The next prime is 115157177. The reversal of 115157172 is 271751511.

It is a super-2 number, since 2×115157172² = 26522348526075168, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (115157177) 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, 409672 + ... + 409952.

It is an arithmetic number, because the mean of its divisors is an integer number (3150504).

Almost surely, 2^115157172 is an apocalyptic number.

115157172 is a gapful number since it is divisible by the number (12) 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 115157172, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (151224192).

115157172 is an abundant number, since it is smaller than the sum of its proper divisors (187291212).

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

115157172 is a wasteful number, since it uses less digits than its factorization.

115157172 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 409 (or 407 counting only the distinct ones).

The product of its digits is 2450, while the sum is 30.

The square root of 115157172 is about 10731.1309748786. The cubic root of 115157172 is about 486.5158538972.

The spelling of 115157172 in words is "one hundred fifteen million, one hundred fifty-seven thousand, one hundred seventy-two".