165150217 has 2 divisors, whose sum is σ = 165150218. Its totient is φ = 165150216.

The previous prime is 165150197. The next prime is 165150247. The reversal of 165150217 is 712051561.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 163942416 + 1207801 = 12804^2 + 1099^2 .

It is a cyclic number.

It is not a de Polignac number, because 165150217 - 2¹¹ = 165148169 is a prime.

It is not a weakly prime, because it can be changed into another prime (165150247) 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 as a sum of consecutive naturals, namely, 82575108 + 82575109.

It is an arithmetic number, because the mean of its divisors is an integer number (82575109).

Almost surely, 2^165150217 is an apocalyptic number.

It is an amenable number.

165150217 is a deficient number, since it is larger than the sum of its proper divisors (1).

165150217 is an equidigital number, since it uses as much as digits as its factorization.

165150217 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2100, while the sum is 28.

The square root of 165150217 is about 12851.0784372363. The cubic root of 165150217 is about 548.6470514617.

The spelling of 165150217 in words is "one hundred sixty-five million, one hundred fifty thousand, two hundred seventeen".