165311141 has 2 divisors, whose sum is σ = 165311142. Its totient is φ = 165311140.

The previous prime is 165311137. The next prime is 165311231. The reversal of 165311141 is 141113561.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 145106116 + 20205025 = 12046^2 + 4495^2 .

It is an emirp because it is prime and its reverse (141113561) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 165311141 - 2² = 165311137 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (165311941) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 82655570 + 82655571.

It is an arithmetic number, because the mean of its divisors is an integer number (82655571).

Almost surely, 2^165311141 is an apocalyptic number.

It is an amenable number.

165311141 is a deficient number, since it is larger than the sum of its proper divisors (1).

165311141 is an equidigital number, since it uses as much as digits as its factorization.

165311141 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 360, while the sum is 23.

The square root of 165311141 is about 12857.3380215346. The cubic root of 165311141 is about 548.8251959780.

The spelling of 165311141 in words is "one hundred sixty-five million, three hundred eleven thousand, one hundred forty-one".