165172355 has 12 divisors (see below), whose sum is σ = 200991600. Its totient is φ = 130306752.

The previous prime is 165172349. The next prime is 165172363. The reversal of 165172355 is 553271561.

It is not a de Polignac number, because 165172355 - 2⁸ = 165172099 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 23546 + ... + 29744.

It is an arithmetic number, because the mean of its divisors is an integer number (16749300).

Almost surely, 2^165172355 is an apocalyptic number.

165172355 is a deficient number, since it is larger than the sum of its proper divisors (35819245).

165172355 is an frugal number, since it uses more digits than its factorization.

165172355 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6350 (or 6277 counting only the distinct ones).

The product of its digits is 31500, while the sum is 35.

The square root of 165172355 is about 12851.9397368646. The cubic root of 165172355 is about 548.6715653173.

The spelling of 165172355 in words is "one hundred sixty-five million, one hundred seventy-two thousand, three hundred fifty-five".