9013221 has 32 divisors (see below), whose sum is σ = 15441920. Its totient is φ = 5089392.

The previous prime is 9013129. The next prime is 9013223. The reversal of 9013221 is 1223109.

It is a happy number.

9013221 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 9013221 - 2⁹ = 9012709 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 9013194 and 9013203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9013223) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 19236 + ... + 19698.

It is an arithmetic number, because the mean of its divisors is an integer number (482560).

Almost surely, 2^9013221 is an apocalyptic number.

It is an amenable number.

9013221 is a deficient number, since it is larger than the sum of its proper divisors (6428699).

9013221 is a wasteful number, since it uses less digits than its factorization.

9013221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 582 (or 576 counting only the distinct ones).

The product of its (nonzero) digits is 108, while the sum is 18.

The square root of 9013221 is about 3002.2026913585. The cubic root of 9013221 is about 208.1101872422.

The spelling of 9013221 in words is "nine million, thirteen thousand, two hundred twenty-one".