165042211 has 2 divisors, whose sum is σ = 165042212. Its totient is φ = 165042210.

The previous prime is 165042203. The next prime is 165042221. The reversal of 165042211 is 112240561.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 165042211 - 2³ = 165042203 is a prime.

It is not a weakly prime, because it can be changed into another prime (165042221) 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, 82521105 + 82521106.

It is an arithmetic number, because the mean of its divisors is an integer number (82521106).

Almost surely, 2^165042211 is an apocalyptic number.

165042211 is a deficient number, since it is larger than the sum of its proper divisors (1).

165042211 is an equidigital number, since it uses as much as digits as its factorization.

165042211 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 480, while the sum is 22.

The square root of 165042211 is about 12846.8755345415. The cubic root of 165042211 is about 548.5274228048.

Adding to 165042211 its reverse (112240561), we get a palindrome (277282772).

The spelling of 165042211 in words is "one hundred sixty-five million, forty-two thousand, two hundred eleven".