172226168 has 8 divisors (see below), whose sum is σ = 322924080. Its totient is φ = 86113080.

The previous prime is 172226161. The next prime is 172226177. The reversal of 172226168 is 861622271.

It is a tau number, because it is divible by the number of its divisors (8).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (172226161) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10764128 + ... + 10764143.

It is an arithmetic number, because the mean of its divisors is an integer number (40365510).

Almost surely, 2^172226168 is an apocalyptic number.

It is an amenable number.

172226168 is a deficient number, since it is larger than the sum of its proper divisors (150697912).

172226168 is a wasteful number, since it uses less digits than its factorization.

172226168 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21528277 (or 21528273 counting only the distinct ones).

The product of its digits is 16128, while the sum is 35.

The square root of 172226168 is about 13123.4967901090. The cubic root of 172226168 is about 556.3734271743.

The spelling of 172226168 in words is "one hundred seventy-two million, two hundred twenty-six thousand, one hundred sixty-eight".