173145172 has 6 divisors (see below), whose sum is σ = 303004058. Its totient is φ = 86572584.

The previous prime is 173145151. The next prime is 173145251. The reversal of 173145172 is 271541371.

173145172 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., 94361796 + 78783376 = 9714^2 + 8876^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21643143 + ... + 21643150.

Almost surely, 2^173145172 is an apocalyptic number.

It is an amenable number.

173145172 is a deficient number, since it is larger than the sum of its proper divisors (129858886).

173145172 is a wasteful number, since it uses less digits than its factorization.

173145172 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43286297 (or 43286295 counting only the distinct ones).

The product of its digits is 5880, while the sum is 31.

The square root of 173145172 is about 13158.4638921114. The cubic root of 173145172 is about 557.3612806141.

The spelling of 173145172 in words is "one hundred seventy-three million, one hundred forty-five thousand, one hundred seventy-two".