165196271 has 4 divisors (see below), whose sum is σ = 165222000. Its totient is φ = 165170544.

The previous prime is 165196261. The next prime is 165196277. The reversal of 165196271 is 172691561.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 172691561 = 7 ⋅24670223.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-165196271 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 (165196277) 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 3 ways as a sum of consecutive naturals, for example, 5630 + ... + 19028.

It is an arithmetic number, because the mean of its divisors is an integer number (41305500).

Almost surely, 2^165196271 is an apocalyptic number.

165196271 is a deficient number, since it is larger than the sum of its proper divisors (25729).

165196271 is a wasteful number, since it uses less digits than its factorization.

165196271 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25728.

The product of its digits is 22680, while the sum is 38.

The square root of 165196271 is about 12852.8701463914. The cubic root of 165196271 is about 548.6980455272.

The spelling of 165196271 in words is "one hundred sixty-five million, one hundred ninety-six thousand, two hundred seventy-one".