9288221 has 4 divisors (see below), whose sum is σ = 9539292. Its totient is φ = 9037152.

The previous prime is 9288211. The next prime is 9288233. The reversal of 9288221 is 1228829.

9288221 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 4044121 + 5244100 = 2011^2 + 2290^2 .

It is a cyclic number.

It is not a de Polignac number, because 9288221 - 2¹⁴ = 9271837 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9288211) 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 in 3 ways as a sum of consecutive naturals, for example, 125480 + ... + 125553.

It is an arithmetic number, because the mean of its divisors is an integer number (2384823).

Almost surely, 2^9288221 is an apocalyptic number.

It is an amenable number.

9288221 is a deficient number, since it is larger than the sum of its proper divisors (251071).

9288221 is a wasteful number, since it uses less digits than its factorization.

9288221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 251070.

The product of its digits is 4608, while the sum is 32.

The square root of 9288221 is about 3047.6582813695. The cubic root of 9288221 is about 210.2055508171.

The spelling of 9288221 in words is "nine million, two hundred eighty-eight thousand, two hundred twenty-one".