165471271 has 4 divisors (see below), whose sum is σ = 189110032. Its totient is φ = 141832512.

The previous prime is 165471259. The next prime is 165471283. The reversal of 165471271 is 172174561.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (165471259) and next prime (165471283).

It is a cyclic number.

It is not a de Polignac number, because 165471271 - 2²¹ = 163374119 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (165471571) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11819370 + ... + 11819383.

It is an arithmetic number, because the mean of its divisors is an integer number (47277508).

Almost surely, 2^165471271 is an apocalyptic number.

165471271 is a deficient number, since it is larger than the sum of its proper divisors (23638761).

165471271 is an equidigital number, since it uses as much as digits as its factorization.

165471271 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23638760.

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

The square root of 165471271 is about 12863.5636975140. The cubic root of 165471271 is about 549.0023468081.

The spelling of 165471271 in words is "one hundred sixty-five million, four hundred seventy-one thousand, two hundred seventy-one".