165172055 has 8 divisors (see below), whose sum is σ = 198298800. Its totient is φ = 132076096.

The previous prime is 165172037. The next prime is 165172087. The reversal of 165172055 is 550271561.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 165172055 - 2¹⁴ = 165155671 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6491 + ... + 19299.

It is an arithmetic number, because the mean of its divisors is an integer number (24787350).

Almost surely, 2^165172055 is an apocalyptic number.

165172055 is a deficient number, since it is larger than the sum of its proper divisors (33126745).

165172055 is a wasteful number, since it uses less digits than its factorization.

165172055 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15393.

The product of its (nonzero) digits is 10500, while the sum is 32.

The square root of 165172055 is about 12851.9280654694. The cubic root of 165172055 is about 548.6712331359.

The spelling of 165172055 in words is "one hundred sixty-five million, one hundred seventy-two thousand, fifty-five".