172224131 has 2 divisors, whose sum is σ = 172224132. Its totient is φ = 172224130.

The previous prime is 172224109. The next prime is 172224139. The reversal of 172224131 is 131422271.

172224131 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is an emirp because it is prime and its reverse (131422271) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-172224131 is a prime.

It is a super-3 number, since 3×172224131³ (a number of 26 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Sophie Germain prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 172224097 and 172224106.

It is not a weakly prime, because it can be changed into another prime (172224139) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 86112065 + 86112066.

It is an arithmetic number, because the mean of its divisors is an integer number (86112066).

Almost surely, 2^172224131 is an apocalyptic number.

172224131 is a deficient number, since it is larger than the sum of its proper divisors (1).

172224131 is an equidigital number, since it uses as much as digits as its factorization.

172224131 is an evil number, because the sum of its binary digits is even.

The product of its digits is 672, while the sum is 23.

The square root of 172224131 is about 13123.4191809909. The cubic root of 172224131 is about 556.3712336688.

The spelling of 172224131 in words is "one hundred seventy-two million, two hundred twenty-four thousand, one hundred thirty-one".