165455271 has 64 divisors (see below), whose sum is σ = 271434240. Its totient is φ = 99187200.

The previous prime is 165455263. The next prime is 165455291. The reversal of 165455271 is 172554561.

It is not a de Polignac number, because 165455271 - 2³ = 165455263 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (165455221) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 1638121 + ... + 1638221.

It is an arithmetic number, because the mean of its divisors is an integer number (4241160).

Almost surely, 2^165455271 is an apocalyptic number.

165455271 is a deficient number, since it is larger than the sum of its proper divisors (105978969).

165455271 is a wasteful number, since it uses less digits than its factorization.

165455271 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 253 (or 247 counting only the distinct ones).

The product of its digits is 42000, while the sum is 36.

The square root of 165455271 is about 12862.9417708392. The cubic root of 165455271 is about 548.9846512476.

The spelling of 165455271 in words is "one hundred sixty-five million, four hundred fifty-five thousand, two hundred seventy-one".