16431172 has 6 divisors (see below), whose sum is σ = 28754558. Its totient is φ = 8215584.

The previous prime is 16431167. The next prime is 16431187. The reversal of 16431172 is 27113461.

16431172 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 13793796 + 2637376 = 3714^2 + 1624^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2053893 + ... + 2053900.

Almost surely, 2^16431172 is an apocalyptic number.

It is an amenable number.

16431172 is a deficient number, since it is larger than the sum of its proper divisors (12323386).

16431172 is a wasteful number, since it uses less digits than its factorization.

16431172 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4107797 (or 4107795 counting only the distinct ones).

The product of its digits is 1008, while the sum is 25.

The square root of 16431172 is about 4053.5382075417. The cubic root of 16431172 is about 254.2276876271.

The spelling of 16431172 in words is "sixteen million, four hundred thirty-one thousand, one hundred seventy-two".