115313520 has 80 divisors (see below), whose sum is σ = 408545280. Its totient is φ = 26356992.

The previous prime is 115313507. The next prime is 115313537. The reversal of 115313520 is 25313511.

It is a tau number, because it is divible by the number of its divisors (80).

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 32640 + ... + 35999.

It is an arithmetic number, because the mean of its divisors is an integer number (5106816).

Almost surely, 2^115313520 is an apocalyptic number.

115313520 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

115313520 is an abundant number, since it is smaller than the sum of its proper divisors (293231760).

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

115313520 is a wasteful number, since it uses less digits than its factorization.

115313520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 68662 (or 68656 counting only the distinct ones).

The product of its (nonzero) digits is 450, while the sum is 21.

The square root of 115313520 is about 10738.4132906124. The cubic root of 115313520 is about 486.7359339284.

Subtracting from 115313520 its reverse (25313511), we obtain a palindrome (90000009).

It can be divided in two parts, 11531 and 3520, that added together give a palindrome (15051).

The spelling of 115313520 in words is "one hundred fifteen million, three hundred thirteen thousand, five hundred twenty".