115561525 has 6 divisors (see below), whose sum is σ = 143296322. Its totient is φ = 92449200.

The previous prime is 115561513. The next prime is 115561541. The reversal of 115561525 is 525165511.

It can be written as a sum of positive squares in 3 ways, for example, as 15100996 + 100460529 = 3886^2 + 10023^2 .

It is not a de Polignac number, because 115561525 - 2¹⁵ = 115528757 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2311206 + ... + 2311255.

Almost surely, 2^115561525 is an apocalyptic number.

It is an amenable number.

115561525 is a deficient number, since it is larger than the sum of its proper divisors (27734797).

115561525 is an equidigital number, since it uses as much as digits as its factorization.

115561525 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4622471 (or 4622466 counting only the distinct ones).

The product of its digits is 7500, while the sum is 31.

The square root of 115561525 is about 10749.9546510671. The cubic root of 115561525 is about 487.0846253607.

The spelling of 115561525 in words is "one hundred fifteen million, five hundred sixty-one thousand, five hundred twenty-five".