173172272 has 90 divisors (see below), whose sum is σ = 422956188. Its totient is φ = 68455296.

The previous prime is 173172203. The next prime is 173172317. The reversal of 173172272 is 272271371.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 131843 + ... + 133149.

Almost surely, 2^173172272 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 173172272, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (211478094).

173172272 is an abundant number, since it is smaller than the sum of its proper divisors (249783916).

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

173172272 is a wasteful number, since it uses less digits than its factorization.

173172272 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1355 (or 1329 counting only the distinct ones).

The product of its digits is 8232, while the sum is 32.

The square root of 173172272 is about 13159.4936072784. The cubic root of 173172272 is about 557.3903577609.

Subtracting 173172272 from its reverse (272271371), we obtain a palindrome (99099099).

The spelling of 173172272 in words is "one hundred seventy-three million, one hundred seventy-two thousand, two hundred seventy-two".