165510172 has 6 divisors (see below), whose sum is σ = 289642808. Its totient is φ = 82755084.

The previous prime is 165510161. The next prime is 165510173. The reversal of 165510172 is 271015561.

It is a self number, because there is not a number n which added to its sum of digits gives 165510172.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (165510173) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20688768 + ... + 20688775.

Almost surely, 2^165510172 is an apocalyptic number.

It is an amenable number.

165510172 is a deficient number, since it is larger than the sum of its proper divisors (124132636).

165510172 is a wasteful number, since it uses less digits than its factorization.

165510172 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41377547 (or 41377545 counting only the distinct ones).

The product of its (nonzero) digits is 2100, while the sum is 28.

The square root of 165510172 is about 12865.0756702011. The cubic root of 165510172 is about 549.0453654880.

The spelling of 165510172 in words is "one hundred sixty-five million, five hundred ten thousand, one hundred seventy-two".