115161520 has 40 divisors (see below), whose sum is σ = 268621200. Its totient is φ = 45914880.

The previous prime is 115161493. The next prime is 115161521. The reversal of 115161520 is 25161511.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (40).

It is a junction number, because it is equal to n+sod(n) for n = 115161491 and 115161500.

It is not an unprimeable number, because it can be changed into a prime (115161521) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 24306 + ... + 28654.

It is an arithmetic number, because the mean of its divisors is an integer number (6715530).

Almost surely, 2^115161520 is an apocalyptic number.

115161520 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

115161520 is an abundant number, since it is smaller than the sum of its proper divisors (153459680).

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

115161520 is a wasteful number, since it uses less digits than its factorization.

115161520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4693 (or 4687 counting only the distinct ones).

The product of its (nonzero) digits is 300, while the sum is 22.

The square root of 115161520 is about 10731.3335611190. Note that the first 3 decimals coincide. The cubic root of 115161520 is about 486.5219769615.

Subtracting from 115161520 its reverse (25161511), we obtain a palindrome (90000009).

The spelling of 115161520 in words is "one hundred fifteen million, one hundred sixty-one thousand, five hundred twenty".