165469231 has 2 divisors, whose sum is σ = 165469232. Its totient is φ = 165469230.

The previous prime is 165469219. The next prime is 165469237. The reversal of 165469231 is 132964561.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 165469231 - 2²⁵ = 131914799 is a prime.

It is a super-2 number, since 2×165469231² = 54760132815462722, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (165469237) 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, 82734615 + 82734616.

It is an arithmetic number, because the mean of its divisors is an integer number (82734616).

Almost surely, 2^165469231 is an apocalyptic number.

165469231 is a deficient number, since it is larger than the sum of its proper divisors (1).

165469231 is an equidigital number, since it uses as much as digits as its factorization.

165469231 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 38880, while the sum is 37.

The square root of 165469231 is about 12863.4844035355. The cubic root of 165469231 is about 549.0000906876. Note that the first 4 decimals are identical.

The spelling of 165469231 in words is "one hundred sixty-five million, four hundred sixty-nine thousand, two hundred thirty-one".