172223924 has 48 divisors (see below), whose sum is σ = 321829200. Its totient is φ = 80510976.

The previous prime is 172223917. The next prime is 172223939. The reversal of 172223924 is 429322271.

It can be written as a sum of positive squares in 8 ways, for example, as 48302500 + 123921424 = 6950^2 + 11132^2 .

It is a super-4 number, since 4×172223924⁴ (a number of 34 digits) contains 4444 as substring. Note that it is a super-d number also for d = 2.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 670004 + ... + 670260.

It is an arithmetic number, because the mean of its divisors is an integer number (6704775).

Almost surely, 2^172223924 is an apocalyptic number.

It is an amenable number.

172223924 is a deficient number, since it is larger than the sum of its proper divisors (149605276).

172223924 is a wasteful number, since it uses less digits than its factorization.

172223924 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 452 (or 450 counting only the distinct ones).

The product of its digits is 12096, while the sum is 32.

The square root of 172223924 is about 13123.4112943244. The cubic root of 172223924 is about 556.3710107638.

The spelling of 172223924 in words is "one hundred seventy-two million, two hundred twenty-three thousand, nine hundred twenty-four".