165181145 has 8 divisors (see below), whose sum is σ = 201009600. Its totient is φ = 130283440.

The previous prime is 165181141. The next prime is 165181199. The reversal of 165181145 is 541181561.

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

It is not a de Polignac number, because 165181145 - 2² = 165181141 is a prime.

It is a super-2 number, since 2×165181145² = 54569621327022050, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (165181141) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 232295 + ... + 233004.

It is an arithmetic number, because the mean of its divisors is an integer number (25126200).

Almost surely, 2^165181145 is an apocalyptic number.

It is an amenable number.

165181145 is a deficient number, since it is larger than the sum of its proper divisors (35828455).

165181145 is an equidigital number, since it uses as much as digits as its factorization.

165181145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 465375.

The product of its digits is 4800, while the sum is 32.

The square root of 165181145 is about 12852.2817040399. The cubic root of 165181145 is about 548.6812980548.

The spelling of 165181145 in words is "one hundred sixty-five million, one hundred eighty-one thousand, one hundred forty-five".