422181223 has 4 divisors (see below), whose sum is σ = 432478368. Its totient is φ = 411884080.

The previous prime is 422181209. The next prime is 422181229. The reversal of 422181223 is 322181224.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-422181223 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (422181229) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5148511 + ... + 5148592.

It is an arithmetic number, because the mean of its divisors is an integer number (108119592).

Almost surely, 2^422181223 is an apocalyptic number.

422181223 is a deficient number, since it is larger than the sum of its proper divisors (10297145).

422181223 is a wasteful number, since it uses less digits than its factorization.

422181223 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10297144.

The product of its digits is 1536, while the sum is 25.

The square root of 422181223 is about 20547.0490095293. The cubic root of 422181223 is about 750.1814215929.

Subtracting from 422181223 its reverse (322181224), we obtain a palindrome (99999999).

The spelling of 422181223 in words is "four hundred twenty-two million, one hundred eighty-one thousand, two hundred twenty-three".