9443221 has 4 divisors (see below), whose sum is σ = 9450700. Its totient is φ = 9435744.

The previous prime is 9443201. The next prime is 9443233. The reversal of 9443221 is 1223449.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 5499025 + 3944196 = 2345^2 + 1986^2 .

It is a cyclic number.

It is not a de Polignac number, because 9443221 - 2⁹ = 9442709 is a prime.

It is a Duffinian number.

It is a nialpdrome in base 10.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9443201) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1326 + ... + 4543.

It is an arithmetic number, because the mean of its divisors is an integer number (2362675).

Almost surely, 2^9443221 is an apocalyptic number.

It is an amenable number.

9443221 is a deficient number, since it is larger than the sum of its proper divisors (7479).

9443221 is a wasteful number, since it uses less digits than its factorization.

9443221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7478.

The product of its digits is 1728, while the sum is 25.

The square root of 9443221 is about 3072.9824275449. The cubic root of 9443221 is about 211.3683957543.

The spelling of 9443221 in words is "nine million, four hundred forty-three thousand, two hundred twenty-one".