165256271 has 2 divisors, whose sum is σ = 165256272. Its totient is φ = 165256270.

The previous prime is 165256253. The next prime is 165256309. The reversal of 165256271 is 172652561.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 165256271 - 2⁶ = 165256207 is a prime.

It is equal to p_9252467 and since 165256271 and 9252467 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (165250271) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 82628135 + 82628136.

It is an arithmetic number, because the mean of its divisors is an integer number (82628136).

Almost surely, 2^165256271 is an apocalyptic number.

165256271 is a deficient number, since it is larger than the sum of its proper divisors (1).

165256271 is an equidigital number, since it uses as much as digits as its factorization.

165256271 is an evil number, because the sum of its binary digits is even.

The product of its digits is 25200, while the sum is 35.

The square root of 165256271 is about 12855.2040434993. The cubic root of 165256271 is about 548.7644673206.

The spelling of 165256271 in words is "one hundred sixty-five million, two hundred fifty-six thousand, two hundred seventy-one".