165709229 has 36 divisors (see below), whose sum is σ = 207169920. Its totient is φ = 131982480.

The previous prime is 165709177. The next prime is 165709259. The reversal of 165709229 is 922907561.

It is not a de Polignac number, because 165709229 - 2⁸ = 165708973 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (165709259) 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 35 ways as a sum of consecutive naturals, for example, 2808602 + ... + 2808660.

It is an arithmetic number, because the mean of its divisors is an integer number (5754720).

Almost surely, 2^165709229 is an apocalyptic number.

It is an amenable number.

165709229 is a deficient number, since it is larger than the sum of its proper divisors (41460691).

165709229 is an equidigital number, since it uses as much as digits as its factorization.

165709229 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 190 (or 140 counting only the distinct ones).

The product of its (nonzero) digits is 68040, while the sum is 41.

The square root of 165709229 is about 12872.8096777665. The cubic root of 165709229 is about 549.2653872885.

The spelling of 165709229 in words is "one hundred sixty-five million, seven hundred nine thousand, two hundred twenty-nine".