4440320221 has 2 divisors, whose sum is σ = 4440320222. Its totient is φ = 4440320220.

The previous prime is 4440320189. The next prime is 4440320281. The reversal of 4440320221 is 1220230444.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 3120451321 + 1319868900 = 55861^2 + 36330^2 .

It is a cyclic number.

It is not a de Polignac number, because 4440320221 - 2⁵ = 4440320189 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 4440320192 and 4440320201.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (4440320281) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2220160110 + 2220160111.

It is an arithmetic number, because the mean of its divisors is an integer number (2220160111).

Almost surely, 2^4440320221 is an apocalyptic number.

It is an amenable number.

4440320221 is a deficient number, since it is larger than the sum of its proper divisors (1).

4440320221 is an equidigital number, since it uses as much as digits as its factorization.

4440320221 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1536, while the sum is 22.

The square root of 4440320221 is about 66635.7278117378. The cubic root of 4440320221 is about 1643.6326650168.

Adding to 4440320221 its reverse (1220230444), we get a palindrome (5660550665).

The spelling of 4440320221 in words is "four billion, four hundred forty million, three hundred twenty thousand, two hundred twenty-one".