220243321 has 2 divisors, whose sum is σ = 220243322. Its totient is φ = 220243320.

The previous prime is 220243319. The next prime is 220243333. The reversal of 220243321 is 123342022.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 172633321 + 47610000 = 13139^2 + 6900^2 .

It is a cyclic number.

It is not a de Polignac number, because 220243321 - 2¹ = 220243319 is a prime.

Together with 220243319, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (220243391) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110121660 + 110121661.

It is an arithmetic number, because the mean of its divisors is an integer number (110121661).

Almost surely, 2^220243321 is an apocalyptic number.

It is an amenable number.

220243321 is a deficient number, since it is larger than the sum of its proper divisors (1).

220243321 is an equidigital number, since it uses as much as digits as its factorization.

220243321 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 576, while the sum is 19.

The square root of 220243321 is about 14840.5970567225. The cubic root of 220243321 is about 603.9035496839.

Adding to 220243321 its reverse (123342022), we get a palindrome (343585343).

The spelling of 220243321 in words is "two hundred twenty million, two hundred forty-three thousand, three hundred twenty-one".