165183975 has 48 divisors (see below), whose sum is σ = 331050240. Its totient is φ = 80085600.

The previous prime is 165183959. The next prime is 165183979. The reversal of 165183975 is 579381561.

It is a happy number.

165183975 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 165183975 - 2⁴ = 165183959 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 165183975.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (165183979) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 3699 + ... + 18548.

It is an arithmetic number, because the mean of its divisors is an integer number (6896880).

Almost surely, 2^165183975 is an apocalyptic number.

165183975 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

165183975 is an abundant number, since it is smaller than the sum of its proper divisors (165866265).

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

165183975 is a wasteful number, since it uses less digits than its factorization.

165183975 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22277 (or 22266 counting only the distinct ones).

The product of its digits is 226800, while the sum is 45.

The square root of 165183975 is about 12852.3918007506. The cubic root of 165183975 is about 548.6844315020.

The spelling of 165183975 in words is "one hundred sixty-five million, one hundred eighty-three thousand, nine hundred seventy-five".