165385875 has 16 divisors (see below), whose sum is σ = 275202720. Its totient is φ = 88205600.

The previous prime is 165385867. The next prime is 165385879. The reversal of 165385875 is 578583561.

It is not a de Polignac number, because 165385875 - 2³ = 165385867 is a prime.

It is not an unprimeable number, because it can be changed into a prime (165385879) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 220140 + ... + 220889.

It is an arithmetic number, because the mean of its divisors is an integer number (17200170).

Almost surely, 2^165385875 is an apocalyptic number.

165385875 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

165385875 is a deficient number, since it is larger than the sum of its proper divisors (109816845).

165385875 is an equidigital number, since it uses as much as digits as its factorization.

165385875 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 441047 (or 441037 counting only the distinct ones).

The product of its digits is 1008000, while the sum is 48.

The square root of 165385875 is about 12860.2439712472. The cubic root of 165385875 is about 548.9078879705.

The spelling of 165385875 in words is "one hundred sixty-five million, three hundred eighty-five thousand, eight hundred seventy-five".