4443221 has 2 divisors, whose sum is σ = 4443222. Its totient is φ = 4443220.

The previous prime is 4443203. The next prime is 4443227. The reversal of 4443221 is 1223444.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2235025 + 2208196 = 1495^2 + 1486^2 .

It is a cyclic number.

It is not a de Polignac number, because 4443221 - 2⁶ = 4443157 is a prime.

It is a Chen prime.

It is a nialpdrome in base 10.

It is a junction number, because it is equal to n+sod(n) for n = 4443193 and 4443202.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (4443227) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2221610 + 2221611.

It is an arithmetic number, because the mean of its divisors is an integer number (2221611).

Almost surely, 2^4443221 is an apocalyptic number.

It is an amenable number.

4443221 is a deficient number, since it is larger than the sum of its proper divisors (1).

4443221 is an equidigital number, since it uses as much as digits as its factorization.

4443221 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 768, while the sum is 20.

The square root of 4443221 is about 2107.8949214797. The cubic root of 4443221 is about 164.3990505369.

Adding to 4443221 its reverse (1223444), we get a palindrome (5666665).

It can be divided in two parts, 4443 and 221, that added together give a palindrome (4664).

The spelling of 4443221 in words is "four million, four hundred forty-three thousand, two hundred twenty-one".