172224163 has 2 divisors, whose sum is σ = 172224164. Its totient is φ = 172224162.

The previous prime is 172224139. The next prime is 172224191. The reversal of 172224163 is 361422271.

It is an a-pointer prime, because the next prime (172224191) can be obtained adding 172224163 to its sum of digits (28).

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 172224163 - 2⁵ = 172224131 is a prime.

It is a super-2 number, since 2×172224163² = 59322324642101138, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (172221163) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 86112081 + 86112082.

It is an arithmetic number, because the mean of its divisors is an integer number (86112082).

Almost surely, 2^172224163 is an apocalyptic number.

172224163 is a deficient number, since it is larger than the sum of its proper divisors (1).

172224163 is an equidigital number, since it uses as much as digits as its factorization.

172224163 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4032, while the sum is 28.

The square root of 172224163 is about 13123.4204001853. The cubic root of 172224163 is about 556.3712681276.

The spelling of 172224163 in words is "one hundred seventy-two million, two hundred twenty-four thousand, one hundred sixty-three".