443221 has 2 divisors, whose sum is σ = 443222. Its totient is φ = 443220.

The previous prime is 443203. The next prime is 443227. The reversal of 443221 is 122344.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 236196 + 207025 = 486^2 + 455^2 .

It is a cyclic number.

It is not a de Polignac number, because 443221 - 2⁵ = 443189 is a prime.

443221 is a lucky number.

It is a nialpdrome in base 10.

It is a junction number, because it is equal to n+sod(n) for n = 443195 and 443204.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (443227) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 221610 + 221611.

It is an arithmetic number, because the mean of its divisors is an integer number (221611).

2⁴⁴³²²¹ is an apocalyptic number.

It is an amenable number.

443221 is a deficient number, since it is larger than the sum of its proper divisors (1).

443221 is an equidigital number, since it uses as much as digits as its factorization.

443221 is an evil number, because the sum of its binary digits is even.

The product of its digits is 192, while the sum is 16.

The square root of 443221 is about 665.7484509933. The cubic root of 443221 is about 76.2441937709.

Adding to 443221 its reverse (122344), we get a palindrome (565565).

It can be divided in two parts, 443 and 221, that multiplied together give a triangular number (97903 = T₄₄₂).

The spelling of 443221 in words is "four hundred forty-three thousand, two hundred twenty-one", and thus it is an iban number.