4440221 has 2 divisors, whose sum is σ = 4440222. Its totient is φ = 4440220.

The previous prime is 4440209. The next prime is 4440239. The reversal of 4440221 is 1220444.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 3024121 + 1416100 = 1739^2 + 1190^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-4440221 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 4440221.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (4440421) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2220110 + 2220111.

It is an arithmetic number, because the mean of its divisors is an integer number (2220111).

Almost surely, 2^4440221 is an apocalyptic number.

It is an amenable number.

4440221 is a deficient number, since it is larger than the sum of its proper divisors (1).

4440221 is an equidigital number, since it uses as much as digits as its factorization.

4440221 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 256, while the sum is 17.

The square root of 4440221 is about 2107.1831908973. The cubic root of 4440221 is about 164.3620422349.

Adding to 4440221 its reverse (1220444), we get a palindrome (5660665).

The spelling of 4440221 in words is "four million, four hundred forty thousand, two hundred twenty-one".