172162171 has 4 divisors (see below), whose sum is σ = 172428912. Its totient is φ = 171895432.

The previous prime is 172162163. The next prime is 172162187. The reversal of 172162171 is 171261271.

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

It is a cyclic number.

It is not a de Polignac number, because 172162171 - 2³ = 172162163 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (172162271) 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, 132400 + ... + 133693.

It is an arithmetic number, because the mean of its divisors is an integer number (43107228).

Almost surely, 2^172162171 is an apocalyptic number.

172162171 is a deficient number, since it is larger than the sum of its proper divisors (266741).

172162171 is an equidigital number, since it uses as much as digits as its factorization.

172162171 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 266740.

The product of its digits is 1176, while the sum is 28.

The square root of 172162171 is about 13121.0583033534. The cubic root of 172162171 is about 556.3045049314.

The spelling of 172162171 in words is "one hundred seventy-two million, one hundred sixty-two thousand, one hundred seventy-one".