172143227 has 2 divisors, whose sum is σ = 172143228. Its totient is φ = 172143226.

The previous prime is 172143197. The next prime is 172143229. The reversal of 172143227 is 722341271.

172143227 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 a cyclic number.

It is not a de Polignac number, because 172143227 - 2⁶ = 172143163 is a prime.

Together with 172143229, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 172143227.

It is not a weakly prime, because it can be changed into another prime (172143229) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 86071613 + 86071614.

It is an arithmetic number, because the mean of its divisors is an integer number (86071614).

Almost surely, 2^172143227 is an apocalyptic number.

172143227 is a deficient number, since it is larger than the sum of its proper divisors (1).

172143227 is an equidigital number, since it uses as much as digits as its factorization.

172143227 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4704, while the sum is 29.

The square root of 172143227 is about 13120.3363905046. The cubic root of 172143227 is about 556.2840997149.

Adding to 172143227 its reverse (722341271), we get a palindrome (894484498).

The spelling of 172143227 in words is "one hundred seventy-two million, one hundred forty-three thousand, two hundred twenty-seven".