165181141 has 2 divisors, whose sum is σ = 165181142. Its totient is φ = 165181140.

The previous prime is 165181127. The next prime is 165181199. The reversal of 165181141 is 141181561.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 152004241 + 13176900 = 12329^2 + 3630^2 .

It is a cyclic number.

It is not a de Polignac number, because 165181141 - 2⁵ = 165181109 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (165181111) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 82590570 + 82590571.

It is an arithmetic number, because the mean of its divisors is an integer number (82590571).

Almost surely, 2^165181141 is an apocalyptic number.

It is an amenable number.

165181141 is a deficient number, since it is larger than the sum of its proper divisors (1).

165181141 is an equidigital number, since it uses as much as digits as its factorization.

165181141 is an evil number, because the sum of its binary digits is even.

The product of its digits is 960, while the sum is 28.

The square root of 165181141 is about 12852.2815484256. The cubic root of 165181141 is about 548.6812936259.

The spelling of 165181141 in words is "one hundred sixty-five million, one hundred eighty-one thousand, one hundred forty-one".