220223231 has 2 divisors, whose sum is σ = 220223232. Its totient is φ = 220223230.

The previous prime is 220223197. The next prime is 220223239. The reversal of 220223231 is 132322022.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-220223231 is a prime.

It is a super-2 number, since 2×220223231² = 96996542944158722, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (220223239) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110111615 + 110111616.

It is an arithmetic number, because the mean of its divisors is an integer number (110111616).

Almost surely, 2^220223231 is an apocalyptic number.

220223231 is a deficient number, since it is larger than the sum of its proper divisors (1).

220223231 is an equidigital number, since it uses as much as digits as its factorization.

220223231 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 288, while the sum is 17.

The square root of 220223231 is about 14839.9201817260. The cubic root of 220223231 is about 603.8851869762.

Adding to 220223231 its reverse (132322022), we get a palindrome (352545253).

The spelling of 220223231 in words is "two hundred twenty million, two hundred twenty-three thousand, two hundred thirty-one".