22131223 has 2 divisors, whose sum is σ = 22131224. Its totient is φ = 22131222.

The previous prime is 22131211. The next prime is 22131259. The reversal of 22131223 is 32213122.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 22131223 - 2¹⁷ = 22000151 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 22131197 and 22131206.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (22132223) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11065611 + 11065612.

It is an arithmetic number, because the mean of its divisors is an integer number (11065612).

Almost surely, 2^22131223 is an apocalyptic number.

22131223 is a deficient number, since it is larger than the sum of its proper divisors (1).

22131223 is an equidigital number, since it uses as much as digits as its factorization.

22131223 is an evil number, because the sum of its binary digits is even.

The product of its digits is 144, while the sum is 16.

The square root of 22131223 is about 4704.3833814858. The cubic root of 22131223 is about 280.7599381636.

Adding to 22131223 its reverse (32213122), we get a palindrome (54344345).

It can be divided in two parts, 2213122 and 3, that multiplied together give a palindrome (6639366).

The spelling of 22131223 in words is "twenty-two million, one hundred thirty-one thousand, two hundred twenty-three".