22223231 has 2 divisors, whose sum is σ = 22223232.
Its totient is φ = 22223230.
The previous prime is 22223219. The next prime is 22223239. The reversal of 22223231 is 13232222.
It is a strong prime.
It is a cyclic number.
It is not a de Polignac number, because 22223231 - 218 = 21961087 is a prime.
It is a super-2 number, since 2×222232312 = 987743992158722, which contains 22 as substring.
It is a Sophie Germain prime.
It is a congruent number.
It is not a weakly prime, because it can be changed into another prime (22223239) by changing a digit.
It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11111615 + 11111616.
It is an arithmetic number, because the mean of its divisors is an integer number (11111616).
Almost surely, 222223231 is an apocalyptic number.
22223231 is a deficient number, since it is larger than the sum of its proper divisors (1).
22223231 is an equidigital number, since it uses as much as digits as its factorization.
22223231 is an odious number, because the sum of its binary digits is odd.
The product of its digits is 288, while the sum is 17.
The square root of 22223231 is about 4714.1522037372.
The cubic root of 22223231 is about 281.1484758835.
Adding to 22223231 its reverse (13232222), we get a palindrome (35455453).
The spelling of 22223231 in words is "twenty-two million, two hundred twenty-three thousand, two hundred thirty-one".