165427171 has 12 divisors (see below), whose sum is σ = 204722832. Its totient is φ = 130886496.

The previous prime is 165427147. The next prime is 165427177. The reversal of 165427171 is 171724561.

It is not a de Polignac number, because 165427171 - 2²⁵ = 131872739 is a prime.

It is a super-2 number, since 2×165427171² = 54732297810126482, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (165427177) 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 in 11 ways as a sum of consecutive naturals, for example, 68736 + ... + 71101.

It is an arithmetic number, because the mean of its divisors is an integer number (17060236).

Almost surely, 2^165427171 is an apocalyptic number.

165427171 is a deficient number, since it is larger than the sum of its proper divisors (39295661).

165427171 is a wasteful number, since it uses less digits than its factorization.

165427171 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 139870 (or 139857 counting only the distinct ones).

The product of its digits is 11760, while the sum is 34.

The square root of 165427171 is about 12861.8494393303. The cubic root of 165427171 is about 548.9535706580.

The spelling of 165427171 in words is "one hundred sixty-five million, four hundred twenty-seven thousand, one hundred seventy-one".