16172172 has 18 divisors (see below), whose sum is σ = 40879748. Its totient is φ = 5390712.

The previous prime is 16172153. The next prime is 16172203. The reversal of 16172172 is 27127161.

16172172 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (18).

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 224578 + ... + 224649.

Almost surely, 2^16172172 is an apocalyptic number.

16172172 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

16172172 is an abundant number, since it is smaller than the sum of its proper divisors (24707576).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

16172172 is a wasteful number, since it uses less digits than its factorization.

16172172 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 449237 (or 449232 counting only the distinct ones).

The product of its digits is 1176, while the sum is 27.

The square root of 16172172 is about 4021.4639125572. The cubic root of 16172172 is about 252.8848335634.

The spelling of 16172172 in words is "sixteen million, one hundred seventy-two thousand, one hundred seventy-two".