165222389 has 2 divisors, whose sum is σ = 165222390. Its totient is φ = 165222388.

The previous prime is 165222329. The next prime is 165222401. The reversal of 165222389 is 983222561.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 119727364 + 45495025 = 10942^2 + 6745^2 .

It is a cyclic number.

It is not a de Polignac number, because 165222389 - 2¹² = 165218293 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (165222319) 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, 82611194 + 82611195.

It is an arithmetic number, because the mean of its divisors is an integer number (82611195).

Almost surely, 2^165222389 is an apocalyptic number.

It is an amenable number.

165222389 is a deficient number, since it is larger than the sum of its proper divisors (1).

165222389 is an equidigital number, since it uses as much as digits as its factorization.

165222389 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 51840, while the sum is 38.

The square root of 165222389 is about 12853.8861438866. The cubic root of 165222389 is about 548.7269609103.

The spelling of 165222389 in words is "one hundred sixty-five million, two hundred twenty-two thousand, three hundred eighty-nine".