171431872 has 14 divisors (see below), whose sum is σ = 340185248. Its totient is φ = 85715904.

The previous prime is 171431863. The next prime is 171431873. The reversal of 171431872 is 278134171.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (171431873) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1339248 + ... + 1339375.

Almost surely, 2^171431872 is an apocalyptic number.

It is an amenable number.

171431872 is a deficient number, since it is larger than the sum of its proper divisors (168753376).

171431872 is an equidigital number, since it uses as much as digits as its factorization.

171431872 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2678635 (or 2678625 counting only the distinct ones).

The product of its digits is 9408, while the sum is 34.

The square root of 171431872 is about 13093.1994562063. The cubic root of 171431872 is about 555.5167894254.

The spelling of 171431872 in words is "one hundred seventy-one million, four hundred thirty-one thousand, eight hundred seventy-two".