9227221 has 2 divisors, whose sum is σ = 9227222. Its totient is φ = 9227220.

The previous prime is 9227213. The next prime is 9227227. The reversal of 9227221 is 1227229.

9227221 is digitally balanced in base 3, 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., 6320196 + 2907025 = 2514^2 + 1705^2 .

It is a cyclic number.

It is not a de Polignac number, because 9227221 - 2³ = 9227213 is a prime.

It is equal to p₆₁₆₆₃₃ and since 9227221 and 616633 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (9227227) 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, 4613610 + 4613611.

It is an arithmetic number, because the mean of its divisors is an integer number (4613611).

Almost surely, 2^9227221 is an apocalyptic number.

It is an amenable number.

9227221 is a deficient number, since it is larger than the sum of its proper divisors (1).

9227221 is an equidigital number, since it uses as much as digits as its factorization.

9227221 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1008, while the sum is 25.

The square root of 9227221 is about 3037.6341122657. The cubic root of 9227221 is about 209.7443677063.

Adding to 9227221 its product of digits (1008), we get a palindrome (9228229).

The spelling of 9227221 in words is "nine million, two hundred twenty-seven thousand, two hundred twenty-one".