172224165 has 8 divisors (see below), whose sum is σ = 275558688. Its totient is φ = 91852880.

The previous prime is 172224163. The next prime is 172224191. The reversal of 172224165 is 561422271.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 172224165 - 2¹ = 172224163 is a prime.

It is a super-2 number, since 2×172224165² = 59322326019894450, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (172224163) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5740791 + ... + 5740820.

It is an arithmetic number, because the mean of its divisors is an integer number (34444836).

Almost surely, 2^172224165 is an apocalyptic number.

172224165 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

172224165 is a deficient number, since it is larger than the sum of its proper divisors (103334523).

172224165 is a wasteful number, since it uses less digits than its factorization.

172224165 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11481619.

The product of its digits is 6720, while the sum is 30.

The square root of 172224165 is about 13123.4204763850. The cubic root of 172224165 is about 556.3712702813.

The spelling of 172224165 in words is "one hundred seventy-two million, two hundred twenty-four thousand, one hundred sixty-five".