165144323 has 16 divisors (see below), whose sum is σ = 172769280. Its totient is φ = 157743936.

The previous prime is 165144319. The next prime is 165144349. The reversal of 165144323 is 323441561.

It is a cyclic number.

It is not a de Polignac number, because 165144323 - 2² = 165144319 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (165144313) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 435548 + ... + 435926.

It is an arithmetic number, because the mean of its divisors is an integer number (10798080).

Almost surely, 2^165144323 is an apocalyptic number.

165144323 is a deficient number, since it is larger than the sum of its proper divisors (7624957).

165144323 is a wasteful number, since it uses less digits than its factorization.

165144323 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 626.

The product of its digits is 8640, while the sum is 29.

The square root of 165144323 is about 12850.8491159145. The cubic root of 165144323 is about 548.6405245468.

Adding to 165144323 its reverse (323441561), we get a palindrome (488585884).

The spelling of 165144323 in words is "one hundred sixty-five million, one hundred forty-four thousand, three hundred twenty-three".