9225221 has 2 divisors, whose sum is σ = 9225222. Its totient is φ = 9225220.

The previous prime is 9225217. The next prime is 9225269. The reversal of 9225221 is 1225229.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 6180196 + 3045025 = 2486^2 + 1745^2 .

It is a cyclic number.

It is not a de Polignac number, because 9225221 - 2² = 9225217 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (9225211) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4612610 + 4612611.

It is an arithmetic number, because the mean of its divisors is an integer number (4612611).

Almost surely, 2^9225221 is an apocalyptic number.

It is an amenable number.

9225221 is a deficient number, since it is larger than the sum of its proper divisors (1).

9225221 is an equidigital number, since it uses as much as digits as its factorization.

9225221 is an evil number, because the sum of its binary digits is even.

The product of its digits is 720, while the sum is 23.

The square root of 9225221 is about 3037.3048908531. The cubic root of 9225221 is about 209.7292125819.

The spelling of 9225221 in words is "nine million, two hundred twenty-five thousand, two hundred twenty-one".