165181143 has 16 divisors (see below), whose sum is σ = 223606656. Its totient is φ = 108450720.

The previous prime is 165181141. The next prime is 165181199. The reversal of 165181143 is 341181561.

It is not a de Polignac number, because 165181143 - 2¹ = 165181141 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 165181143.

It is a congruent number.

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

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 56680 + ... + 59522.

It is an arithmetic number, because the mean of its divisors is an integer number (13975416).

Almost surely, 2^165181143 is an apocalyptic number.

165181143 is a deficient number, since it is larger than the sum of its proper divisors (58425513).

165181143 is a wasteful number, since it uses less digits than its factorization.

165181143 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3134.

The product of its digits is 2880, while the sum is 30.

The square root of 165181143 is about 12852.2816262328. The cubic root of 165181143 is about 548.6812958403.

The spelling of 165181143 in words is "one hundred sixty-five million, one hundred eighty-one thousand, one hundred forty-three".