165239361 has 48 divisors (see below), whose sum is σ = 284544000. Its totient is φ = 90405504.

The previous prime is 165239341. The next prime is 165239377. The reversal of 165239361 is 163932561.

165239361 is a `hidden beast` number, since 1 + 65 + 239 + 361 = 666.

It is not a de Polignac number, because 165239361 - 2⁶ = 165239297 is a prime.

It is not an unprimeable number, because it can be changed into a prime (165239341) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 271920 + ... + 272526.

It is an arithmetic number, because the mean of its divisors is an integer number (5928000).

Almost surely, 2^165239361 is an apocalyptic number.

It is an amenable number.

165239361 is a deficient number, since it is larger than the sum of its proper divisors (119304639).

165239361 is a wasteful number, since it uses less digits than its factorization.

165239361 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 798 (or 795 counting only the distinct ones).

The product of its digits is 29160, while the sum is 36.

The square root of 165239361 is about 12854.5463163816. The cubic root of 165239361 is about 548.7457490724.

It can be divided in two parts, 165239 and 361, that added together give a triangular number (165600 = T₅₇₅).

The spelling of 165239361 in words is "one hundred sixty-five million, two hundred thirty-nine thousand, three hundred sixty-one".