115525521 has 40 divisors (see below), whose sum is σ = 177887424. Its totient is φ = 74688480.

The previous prime is 115525513. The next prime is 115525537. The reversal of 115525521 is 125525511.

115525521 is a `hidden beast` number, since 115 + 5 + 25 + 521 = 666.

It is not a de Polignac number, because 115525521 - 2³ = 115525513 is a prime.

It is a super-2 number, since 2×115525521² = 26692292004642882, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (115525121) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 508810 + ... + 509036.

Almost surely, 2^115525521 is an apocalyptic number.

It is an amenable number.

115525521 is a deficient number, since it is larger than the sum of its proper divisors (62361903).

115525521 is a wasteful number, since it uses less digits than its factorization.

115525521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 403 (or 394 counting only the distinct ones).

The product of its digits is 2500, while the sum is 27.

The square root of 115525521 is about 10748.2799088971. The cubic root of 115525521 is about 487.0340352344.

The spelling of 115525521 in words is "one hundred fifteen million, five hundred twenty-five thousand, five hundred twenty-one".