172226423 has 2 divisors, whose sum is σ = 172226424. Its totient is φ = 172226422.

The previous prime is 172226401. The next prime is 172226459. The reversal of 172226423 is 324622271.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 172226423 - 2¹⁸ = 171964279 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (172226123) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 86113211 + 86113212.

It is an arithmetic number, because the mean of its divisors is an integer number (86113212).

Almost surely, 2^172226423 is an apocalyptic number.

172226423 is a deficient number, since it is larger than the sum of its proper divisors (1).

172226423 is an equidigital number, since it uses as much as digits as its factorization.

172226423 is an evil number, because the sum of its binary digits is even.

The product of its digits is 8064, while the sum is 29.

The square root of 172226423 is about 13123.5065055038. The cubic root of 172226423 is about 556.3737017651.

Adding to 172226423 its reverse (324622271), we get a palindrome (496848694).

The spelling of 172226423 in words is "one hundred seventy-two million, two hundred twenty-six thousand, four hundred twenty-three".