3243221 has 2 divisors, whose sum is σ = 3243222. Its totient is φ = 3243220.

The previous prime is 3243197. The next prime is 3243239. The reversal of 3243221 is 1223423.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2002225 + 1240996 = 1415^2 + 1114^2 .

It is a cyclic number.

It is not a de Polignac number, because 3243221 - 2¹⁴ = 3226837 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 3243221.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3243271) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1621610 + 1621611.

It is an arithmetic number, because the mean of its divisors is an integer number (1621611).

Almost surely, 2^3243221 is an apocalyptic number.

It is an amenable number.

3243221 is a deficient number, since it is larger than the sum of its proper divisors (1).

3243221 is an equidigital number, since it uses as much as digits as its factorization.

3243221 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 288, while the sum is 17.

The square root of 3243221 is about 1800.8944999638. The cubic root of 3243221 is about 148.0217432140.

Adding to 3243221 its reverse (1223423), we get a palindrome (4466644).

The spelling of 3243221 in words is "three million, two hundred forty-three thousand, two hundred twenty-one".