172207223 has 2 divisors, whose sum is σ = 172207224. Its totient is φ = 172207222.

The previous prime is 172207207. The next prime is 172207261. The reversal of 172207223 is 322702271.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 172207223 - 2⁴ = 172207207 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 172207192 and 172207201.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (172207283) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 86103611 + 86103612.

It is an arithmetic number, because the mean of its divisors is an integer number (86103612).

Almost surely, 2^172207223 is an apocalyptic number.

172207223 is a deficient number, since it is larger than the sum of its proper divisors (1).

172207223 is an equidigital number, since it uses as much as digits as its factorization.

172207223 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2352, while the sum is 26.

The square root of 172207223 is about 13122.7749733050. The cubic root of 172207223 is about 556.3530259364.

Adding to 172207223 its reverse (322702271), we get a palindrome (494909494).

The spelling of 172207223 in words is "one hundred seventy-two million, two hundred seven thousand, two hundred twenty-three".