9087221 has 24 divisors (see below), whose sum is σ = 11060280. Its totient is φ = 7413120.

The previous prime is 9087217. The next prime is 9087223. The reversal of 9087221 is 1227809.

It is a happy number.

9087221 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 1464100 + 7623121 = 1210^2 + 2761^2 .

It is not a de Polignac number, because 9087221 - 2² = 9087217 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9087223) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 83315 + ... + 83423.

It is an arithmetic number, because the mean of its divisors is an integer number (460845).

Almost surely, 2^9087221 is an apocalyptic number.

It is an amenable number.

9087221 is a deficient number, since it is larger than the sum of its proper divisors (1973059).

9087221 is a wasteful number, since it uses less digits than its factorization.

9087221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 197 (or 186 counting only the distinct ones).

The product of its (nonzero) digits is 2016, while the sum is 29.

The square root of 9087221 is about 3014.5017830481. The cubic root of 9087221 is about 208.6781750580.

The spelling of 9087221 in words is "nine million, eighty-seven thousand, two hundred twenty-one".