161253269 has 2 divisors, whose sum is σ = 161253270. Its totient is φ = 161253268.

The previous prime is 161253263. The next prime is 161253293. The reversal of 161253269 is 962352161.

161253269 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., 124590244 + 36663025 = 11162^2 + 6055^2 .

It is a cyclic number.

It is not a de Polignac number, because 161253269 - 2⁸ = 161253013 is a prime.

It is a super-2 number, since 2×161253269² = 52005233526372722, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (161253263) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 80626634 + 80626635.

It is an arithmetic number, because the mean of its divisors is an integer number (80626635).

Almost surely, 2^161253269 is an apocalyptic number.

It is an amenable number.

161253269 is a deficient number, since it is larger than the sum of its proper divisors (1).

161253269 is an equidigital number, since it uses as much as digits as its factorization.

161253269 is an evil number, because the sum of its binary digits is even.

The product of its digits is 19440, while the sum is 35.

The square root of 161253269 is about 12698.5538152972. The cubic root of 161253269 is about 544.2972948325.

The spelling of 161253269 in words is "one hundred sixty-one million, two hundred fifty-three thousand, two hundred sixty-nine".