222445231 has 2 divisors, whose sum is σ = 222445232. Its totient is φ = 222445230.

The previous prime is 222445193. The next prime is 222445253. The reversal of 222445231 is 132544222.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 222445231 - 2¹¹ = 222443183 is a prime.

It is a super-2 number, since 2×222445231² = 98963761589286722, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 222445196 and 222445205.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (222445261) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 111222615 + 111222616.

It is an arithmetic number, because the mean of its divisors is an integer number (111222616).

Almost surely, 2^222445231 is an apocalyptic number.

222445231 is a deficient number, since it is larger than the sum of its proper divisors (1).

222445231 is an equidigital number, since it uses as much as digits as its factorization.

222445231 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3840, while the sum is 25.

The square root of 222445231 is about 14914.5979161357. The cubic root of 222445231 is about 605.9094134584.

Adding to 222445231 its reverse (132544222), we get a palindrome (354989453).

The spelling of 222445231 in words is "two hundred twenty-two million, four hundred forty-five thousand, two hundred thirty-one".