4450644221 has 2 divisors, whose sum is σ = 4450644222. Its totient is φ = 4450644220.

The previous prime is 4450644199. The next prime is 4450644229. The reversal of 4450644221 is 1224460544.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 4399005625 + 51638596 = 66325^2 + 7186^2 .

It is a cyclic number.

It is not a de Polignac number, because 4450644221 - 2⁶ = 4450644157 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (4450644229) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2225322110 + 2225322111.

It is an arithmetic number, because the mean of its divisors is an integer number (2225322111).

Almost surely, 2^4450644221 is an apocalyptic number.

It is an amenable number.

4450644221 is a deficient number, since it is larger than the sum of its proper divisors (1).

4450644221 is an equidigital number, since it uses as much as digits as its factorization.

4450644221 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 30720, while the sum is 32.

The square root of 4450644221 is about 66713.1487864274. The cubic root of 4450644221 is about 1644.9055258733.

The spelling of 4450644221 in words is "four billion, four hundred fifty million, six hundred forty-four thousand, two hundred twenty-one".