165143165 has 16 divisors (see below), whose sum is σ = 219735936. Its totient is φ = 118132800.

The previous prime is 165143137. The next prime is 165143221. The reversal of 165143165 is 561341561.

It is not a de Polignac number, because 165143165 - 2¹⁰ = 165142141 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 15 ways as a sum of consecutive naturals, for example, 21257 + ... + 27966.

It is an arithmetic number, because the mean of its divisors is an integer number (13733496).

Almost surely, 2^165143165 is an apocalyptic number.

It is an amenable number.

165143165 is a deficient number, since it is larger than the sum of its proper divisors (54592771).

165143165 is a wasteful number, since it uses less digits than its factorization.

165143165 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49300.

The product of its digits is 10800, while the sum is 32.

The square root of 165143165 is about 12850.8040604470. The cubic root of 165143165 is about 548.6392421792.

The spelling of 165143165 in words is "one hundred sixty-five million, one hundred forty-three thousand, one hundred sixty-five".