172155199 has 2 divisors, whose sum is σ = 172155200. Its totient is φ = 172155198.

The previous prime is 172155173. The next prime is 172155229. The reversal of 172155199 is 991551271.

172155199 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 172155199 - 2²³ = 163766591 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (172155149) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 86077599 + 86077600.

It is an arithmetic number, because the mean of its divisors is an integer number (86077600).

Almost surely, 2^172155199 is an apocalyptic number.

172155199 is a deficient number, since it is larger than the sum of its proper divisors (1).

172155199 is an equidigital number, since it uses as much as digits as its factorization.

172155199 is an evil number, because the sum of its binary digits is even.

The product of its digits is 28350, while the sum is 40.

The square root of 172155199 is about 13120.7926208747. The cubic root of 172155199 is about 556.2969953309.

The spelling of 172155199 in words is "one hundred seventy-two million, one hundred fifty-five thousand, one hundred ninety-nine".