222968321 has 2 divisors, whose sum is σ = 222968322. Its totient is φ = 222968320.

The previous prime is 222968203. The next prime is 222968351. The reversal of 222968321 is 123869222.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 197009296 + 25959025 = 14036^2 + 5095^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-222968321 is a prime.

It is not a weakly prime, because it can be changed into another prime (222968351) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 111484160 + 111484161.

It is an arithmetic number, because the mean of its divisors is an integer number (111484161).

Almost surely, 2^222968321 is an apocalyptic number.

It is an amenable number.

222968321 is a deficient number, since it is larger than the sum of its proper divisors (1).

222968321 is an equidigital number, since it uses as much as digits as its factorization.

222968321 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 20736, while the sum is 35.

The square root of 222968321 is about 14932.1237940221. The cubic root of 222968321 is about 606.3839827726.

Subtracting from 222968321 its reverse (123869222), we obtain a palindrome (99099099).

The spelling of 222968321 in words is "two hundred twenty-two million, nine hundred sixty-eight thousand, three hundred twenty-one".