115205165 has 4 divisors (see below), whose sum is σ = 138246204. Its totient is φ = 92164128.

The previous prime is 115205159. The next prime is 115205171. The reversal of 115205165 is 561502511.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (115205159) and next prime (115205171).

It can be written as a sum of positive squares in 2 ways, for example, as 70073641 + 45131524 = 8371^2 + 6718^2 .

It is a cyclic number.

It is not a de Polignac number, because 115205165 - 2²⁰ = 114156589 is a prime.

It is a Duffinian number.

It is a Curzon number.

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, 11520512 + ... + 11520521.

It is an arithmetic number, because the mean of its divisors is an integer number (34561551).

Almost surely, 2^115205165 is an apocalyptic number.

It is an amenable number.

115205165 is a deficient number, since it is larger than the sum of its proper divisors (23041039).

115205165 is an equidigital number, since it uses as much as digits as its factorization.

115205165 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23041038.

The product of its (nonzero) digits is 1500, while the sum is 26.

The square root of 115205165 is about 10733.3668995334. The cubic root of 115205165 is about 486.5834314292.

Adding to 115205165 its reverse (561502511), we get a palindrome (676707676).

The spelling of 115205165 in words is "one hundred fifteen million, two hundred five thousand, one hundred sixty-five".