22531223 has 8 divisors (see below), whose sum is σ = 26470416. Its totient is φ = 18907200.

The previous prime is 22531217. The next prime is 22531241. The reversal of 22531223 is 32213522.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 22531223 - 2¹⁰ = 22530199 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 22531195 and 22531204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22531253) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 78638 + ... + 78923.

It is an arithmetic number, because the mean of its divisors is an integer number (3308802).

Almost surely, 2^22531223 is an apocalyptic number.

22531223 is a deficient number, since it is larger than the sum of its proper divisors (3939193).

22531223 is a wasteful number, since it uses less digits than its factorization.

22531223 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 157585.

The product of its digits is 720, while the sum is 20.

The square root of 22531223 is about 4746.7065424355. The cubic root of 22531223 is about 282.4413348305.

Adding to 22531223 its reverse (32213522), we get a palindrome (54744745).

The spelling of 22531223 in words is "twenty-two million, five hundred thirty-one thousand, two hundred twenty-three".