165331241 has 2 divisors, whose sum is σ = 165331242. Its totient is φ = 165331240.

The previous prime is 165331237. The next prime is 165331247. The reversal of 165331241 is 142133561.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 95257600 + 70073641 = 9760^2 + 8371^2 .

It is a cyclic number.

It is not a de Polignac number, because 165331241 - 2² = 165331237 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 165331241.

It is not a weakly prime, because it can be changed into another prime (165331247) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 82665620 + 82665621.

It is an arithmetic number, because the mean of its divisors is an integer number (82665621).

Almost surely, 2^165331241 is an apocalyptic number.

It is an amenable number.

165331241 is a deficient number, since it is larger than the sum of its proper divisors (1).

165331241 is an equidigital number, since it uses as much as digits as its factorization.

165331241 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2160, while the sum is 26.

The square root of 165331241 is about 12858.1196525775. The cubic root of 165331241 is about 548.8474387607.

The spelling of 165331241 in words is "one hundred sixty-five million, three hundred thirty-one thousand, two hundred forty-one".