165236165 has 4 divisors (see below), whose sum is σ = 198283404. Its totient is φ = 132188928.

The previous prime is 165236147. The next prime is 165236207. The reversal of 165236165 is 561632561.

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

It can be written as a sum of positive squares in 2 ways, for example, as 111154849 + 54081316 = 10543^2 + 7354^2 .

It is a cyclic number.

It is not a de Polignac number, because 165236165 - 2²² = 161041861 is a prime.

It is an alternating number because its digits alternate between odd and even.

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 3 ways as a sum of consecutive naturals, for example, 16523612 + ... + 16523621.

It is an arithmetic number, because the mean of its divisors is an integer number (49570851).

Almost surely, 2^165236165 is an apocalyptic number.

It is an amenable number.

165236165 is a deficient number, since it is larger than the sum of its proper divisors (33047239).

165236165 is an equidigital number, since it uses as much as digits as its factorization.

165236165 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33047238.

The product of its digits is 32400, while the sum is 35.

The square root of 165236165 is about 12854.4220017860. The cubic root of 165236165 is about 548.7422111690.

The spelling of 165236165 in words is "one hundred sixty-five million, two hundred thirty-six thousand, one hundred sixty-five".