172143207 has 24 divisors (see below), whose sum is σ = 263834064. Its totient is φ = 107783424.

The previous prime is 172143197. The next prime is 172143227. The reversal of 172143207 is 702341271.

It is a happy number.

It is not a de Polignac number, because 172143207 - 2⁸ = 172142951 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (172143227) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 99048 + ... + 100770.

It is an arithmetic number, because the mean of its divisors is an integer number (10993086).

Almost surely, 2^172143207 is an apocalyptic number.

172143207 is a gapful number since it is divisible by the number (17) formed by its first and last digit.

172143207 is a deficient number, since it is larger than the sum of its proper divisors (91690857).

172143207 is a wasteful number, since it uses less digits than its factorization.

172143207 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2399 (or 2396 counting only the distinct ones).

The product of its (nonzero) digits is 2352, while the sum is 27.

The square root of 172143207 is about 13120.3356283290. The cubic root of 172143207 is about 556.2840781714.

Adding to 172143207 its reverse (702341271), we get a palindrome (874484478).

The spelling of 172143207 in words is "one hundred seventy-two million, one hundred forty-three thousand, two hundred seven".