165326172 has 60 divisors (see below), whose sum is σ = 424785480. Its totient is φ = 50045600.

The previous prime is 165326171. The next prime is 165326177. The reversal of 165326172 is 271623561.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (165326171) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 175222 + ... + 176162.

It is an arithmetic number, because the mean of its divisors is an integer number (7079758).

Almost surely, 2^165326172 is an apocalyptic number.

165326172 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 165326172, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (212392740).

165326172 is an abundant number, since it is smaller than the sum of its proper divisors (259459308).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

165326172 is an equidigital number, since it uses as much as digits as its factorization.

165326172 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 992 (or 957 counting only the distinct ones).

The product of its digits is 15120, while the sum is 33.

The square root of 165326172 is about 12857.9225382641. The cubic root of 165326172 is about 548.8418295443.

The spelling of 165326172 in words is "one hundred sixty-five million, three hundred twenty-six thousand, one hundred seventy-two".