115156521 has 24 divisors (see below), whose sum is σ = 176623200. Its totient is φ = 72049536.

The previous prime is 115156513. The next prime is 115156523. The reversal of 115156521 is 125651511.

115156521 is a `hidden beast` number, since 1 + 1 + 5 + 1 + 5 + 652 + 1 = 666.

It is not a de Polignac number, because 115156521 - 2³ = 115156513 is a prime.

It is a super-2 number, since 2×115156521² = 26522048657646882, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (115156523) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 66930 + ... + 68628.

It is an arithmetic number, because the mean of its divisors is an integer number (7359300).

Almost surely, 2^115156521 is an apocalyptic number.

It is an amenable number.

115156521 is a deficient number, since it is larger than the sum of its proper divisors (61466679).

115156521 is a wasteful number, since it uses less digits than its factorization.

115156521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2165 (or 2162 counting only the distinct ones).

The product of its digits is 1500, while the sum is 27.

The square root of 115156521 is about 10731.1006425250. The cubic root of 115156521 is about 486.5149371142.

The spelling of 115156521 in words is "one hundred fifteen million, one hundred fifty-six thousand, five hundred twenty-one".