115521685 has 4 divisors (see below), whose sum is σ = 138626028. Its totient is φ = 92417344.

The previous prime is 115521677. The next prime is 115521713. The reversal of 115521685 is 586125511.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 586125511 = 5701 ⋅102811.

It can be written as a sum of positive squares in 2 ways, for example, as 89245809 + 26275876 = 9447^2 + 5126^2 .

It is a cyclic number.

It is not a de Polignac number, because 115521685 - 2³ = 115521677 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 115521685.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11552164 + ... + 11552173.

It is an arithmetic number, because the mean of its divisors is an integer number (34656507).

Almost surely, 2^115521685 is an apocalyptic number.

It is an amenable number.

115521685 is a deficient number, since it is larger than the sum of its proper divisors (23104343).

115521685 is an equidigital number, since it uses as much as digits as its factorization.

115521685 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23104342.

The product of its digits is 12000, while the sum is 34.

The square root of 115521685 is about 10748.1014602580. The cubic root of 115521685 is about 487.0286445547.

The spelling of 115521685 in words is "one hundred fifteen million, five hundred twenty-one thousand, six hundred eighty-five".