422565223 has 4 divisors (see below), whose sum is σ = 440937648. Its totient is φ = 404192800.

The previous prime is 422565217. The next prime is 422565289. The reversal of 422565223 is 322565224.

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

It is not a de Polignac number, because 422565223 - 2¹⁷ = 422434151 is a prime.

It is a super-2 number, since 2×422565223² = 357122735378079458, which contains 22 as substring.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (422569223) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9186178 + ... + 9186223.

It is an arithmetic number, because the mean of its divisors is an integer number (110234412).

Almost surely, 2^422565223 is an apocalyptic number.

422565223 is a deficient number, since it is larger than the sum of its proper divisors (18372425).

422565223 is a wasteful number, since it uses less digits than its factorization.

422565223 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18372424.

The product of its digits is 28800, while the sum is 31.

The square root of 422565223 is about 20556.3912932207. The cubic root of 422565223 is about 750.4087981753.

Subtracting from 422565223 its reverse (322565224), we obtain a palindrome (99999999).

The spelling of 422565223 in words is "four hundred twenty-two million, five hundred sixty-five thousand, two hundred twenty-three".