115865165 has 16 divisors (see below), whose sum is σ = 150011568. Its totient is φ = 85403136.

The previous prime is 115865131. The next prime is 115865207. The reversal of 115865165 is 561568511.

It can be written as a sum of positive squares in 8 ways, for example, as 1075369 + 114789796 = 1037^2 + 10714^2 .

It is not a de Polignac number, because 115865165 - 2¹⁴ = 115848781 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 15 ways as a sum of consecutive naturals, for example, 42689 + ... + 45321.

It is an arithmetic number, because the mean of its divisors is an integer number (9375723).

Almost surely, 2^115865165 is an apocalyptic number.

It is an amenable number.

115865165 is a deficient number, since it is larger than the sum of its proper divisors (34146403).

115865165 is a wasteful number, since it uses less digits than its factorization.

115865165 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3328.

The product of its digits is 36000, while the sum is 38.

The square root of 115865165 is about 10764.0682364987. The cubic root of 115865165 is about 487.5108601569.

The spelling of 115865165 in words is "one hundred fifteen million, eight hundred sixty-five thousand, one hundred sixty-five".