165222241 has 2 divisors, whose sum is σ = 165222242. Its totient is φ = 165222240.

The previous prime is 165222229. The next prime is 165222257. The reversal of 165222241 is 142222561.

165222241 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 124211025 + 41011216 = 11145^2 + 6404^2 .

It is a cyclic number.

It is not a de Polignac number, because 165222241 - 2²⁷ = 31004513 is a prime.

It is not a weakly prime, because it can be changed into another prime (165226241) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 82611120 + 82611121.

It is an arithmetic number, because the mean of its divisors is an integer number (82611121).

Almost surely, 2^165222241 is an apocalyptic number.

It is an amenable number.

165222241 is a deficient number, since it is larger than the sum of its proper divisors (1).

165222241 is an equidigital number, since it uses as much as digits as its factorization.

165222241 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1920, while the sum is 25.

The square root of 165222241 is about 12853.8803868715. The cubic root of 165222241 is about 548.7267970672.

The spelling of 165222241 in words is "one hundred sixty-five million, two hundred twenty-two thousand, two hundred forty-one".