9933221 has 2 divisors, whose sum is σ = 9933222. Its totient is φ = 9933220.

The previous prime is 9933199. The next prime is 9933229. The reversal of 9933221 is 1223399.

9933221 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 9672100 + 261121 = 3110^2 + 511^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-9933221 is a prime.

It is a Chen prime.

It is a nialpdrome in base 10.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (9933229) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4966610 + 4966611.

It is an arithmetic number, because the mean of its divisors is an integer number (4966611).

Almost surely, 2^9933221 is an apocalyptic number.

It is an amenable number.

9933221 is a deficient number, since it is larger than the sum of its proper divisors (1).

9933221 is an equidigital number, since it uses as much as digits as its factorization.

9933221 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2916, while the sum is 29.

The square root of 9933221 is about 3151.7012866070. The cubic root of 9933221 is about 214.9628275377.

The spelling of 9933221 in words is "nine million, nine hundred thirty-three thousand, two hundred twenty-one".