165922201 has 2 divisors, whose sum is σ = 165922202. Its totient is φ = 165922200.

The previous prime is 165922123. The next prime is 165922213. The reversal of 165922201 is 102229561.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 146385801 + 19536400 = 12099^2 + 4420^2 .

It is a cyclic number.

It is not a de Polignac number, because 165922201 - 2⁷ = 165922073 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 165922201.

It is not a weakly prime, because it can be changed into another prime (165922241) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 82961100 + 82961101.

It is an arithmetic number, because the mean of its divisors is an integer number (82961101).

Almost surely, 2^165922201 is an apocalyptic number.

It is an amenable number.

165922201 is a deficient number, since it is larger than the sum of its proper divisors (1).

165922201 is an equidigital number, since it uses as much as digits as its factorization.

165922201 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2160, while the sum is 28.

The square root of 165922201 is about 12881.0791861552. The cubic root of 165922201 is about 549.5005946061.

The spelling of 165922201 in words is "one hundred sixty-five million, nine hundred twenty-two thousand, two hundred one".