165122413 has 2 divisors, whose sum is σ = 165122414. Its totient is φ = 165122412.

The previous prime is 165122393. The next prime is 165122429. The reversal of 165122413 is 314221561.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 163916809 + 1205604 = 12803^2 + 1098^2 .

It is a cyclic number.

It is not a de Polignac number, because 165122413 - 2⁵ = 165122381 is a prime.

It is a super-2 number, since 2×165122413² = 54530822549885138, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (165122473) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 82561206 + 82561207.

It is an arithmetic number, because the mean of its divisors is an integer number (82561207).

Almost surely, 2^165122413 is an apocalyptic number.

It is an amenable number.

165122413 is a deficient number, since it is larger than the sum of its proper divisors (1).

165122413 is an equidigital number, since it uses as much as digits as its factorization.

165122413 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1440, while the sum is 25.

The square root of 165122413 is about 12849.9966147855. The cubic root of 165122413 is about 548.6162604258.

Adding to 165122413 its reverse (314221561), we get a palindrome (479343974).

The spelling of 165122413 in words is "one hundred sixty-five million, one hundred twenty-two thousand, four hundred thirteen".