220221233 has 2 divisors, whose sum is σ = 220221234. Its totient is φ = 220221232.

The previous prime is 220221227. The next prime is 220221341. The reversal of 220221233 is 332122022.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 219869584 + 351649 = 14828^2 + 593^2 .

It is a cyclic number.

It is not a de Polignac number, because 220221233 - 2²⁶ = 153112369 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (220221223) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110110616 + 110110617.

It is an arithmetic number, because the mean of its divisors is an integer number (110110617).

Almost surely, 2^220221233 is an apocalyptic number.

It is an amenable number.

220221233 is a deficient number, since it is larger than the sum of its proper divisors (1).

220221233 is an equidigital number, since it uses as much as digits as its factorization.

220221233 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 220221233 is about 14839.8528631520. The cubic root of 220221233 is about 603.8833606986.

Adding to 220221233 its reverse (332122022), we get a palindrome (552343255).

The spelling of 220221233 in words is "two hundred twenty million, two hundred twenty-one thousand, two hundred thirty-three".