23172422 has 16 divisors (see below), whose sum is σ = 42780192. Its totient is φ = 9167040.

The previous prime is 23172389. The next prime is 23172437. The reversal of 23172422 is 22427132.

It is a happy number.

It is a super-2 number, since 2×23172422² = 1073922282692168, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 63479 + ... + 63842.

It is an arithmetic number, because the mean of its divisors is an integer number (2673762).

Almost surely, 2^23172422 is an apocalyptic number.

23172422 is a deficient number, since it is larger than the sum of its proper divisors (19607770).

23172422 is a wasteful number, since it uses less digits than its factorization.

23172422 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 127343.

The product of its digits is 1344, while the sum is 23.

The square root of 23172422 is about 4813.7741949535. The cubic root of 23172422 is about 285.0955747988.

Adding to 23172422 its reverse (22427132), we get a palindrome (45599554).

The spelling of 23172422 in words is "twenty-three million, one hundred seventy-two thousand, four hundred twenty-two".