215865165 has 8 divisors (see below), whose sum is σ = 345384288. Its totient is φ = 115128080.

The previous prime is 215865163. The next prime is 215865173. The reversal of 215865165 is 561568512.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 215865165 - 2¹ = 215865163 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (215865163) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7195491 + ... + 7195520.

It is an arithmetic number, because the mean of its divisors is an integer number (43173036).

Almost surely, 2^215865165 is an apocalyptic number.

It is an amenable number.

215865165 is a deficient number, since it is larger than the sum of its proper divisors (129519123).

215865165 is a wasteful number, since it uses less digits than its factorization.

215865165 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14391019.

The product of its digits is 72000, while the sum is 39.

The square root of 215865165 is about 14692.3505607510. The cubic root of 215865165 is about 599.8751267907.

The spelling of 215865165 in words is "two hundred fifteen million, eight hundred sixty-five thousand, one hundred sixty-five".