173145872 has 20 divisors (see below), whose sum is σ = 335728140. Its totient is φ = 86506368.

The previous prime is 173145871. The next prime is 173145883. The reversal of 173145872 is 278541371.

173145872 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 2 ways, for example, as 111429136 + 61716736 = 10556^2 + 7856^2 .

It is not an unprimeable number, because it can be changed into a prime (173145871) 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, 22454 + ... + 29162.

It is an arithmetic number, because the mean of its divisors is an integer number (16786407).

Almost surely, 2^173145872 is an apocalyptic number.

It is an amenable number.

173145872 is a deficient number, since it is larger than the sum of its proper divisors (162582268).

173145872 is a wasteful number, since it uses less digits than its factorization.

173145872 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8330 (or 8324 counting only the distinct ones).

The product of its digits is 47040, while the sum is 38.

The square root of 173145872 is about 13158.4904909340. The cubic root of 173145872 is about 557.3620317225.

The spelling of 173145872 in words is "one hundred seventy-three million, one hundred forty-five thousand, eight hundred seventy-two".