9221213 has 8 divisors (see below), whose sum is σ = 9743520. Its totient is φ = 8702640.

The previous prime is 9221207. The next prime is 9221227. The reversal of 9221213 is 3121229.

9221213 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 9221213 - 2⁸ = 9220957 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 (9221203) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5258 + ... + 6788.

It is an arithmetic number, because the mean of its divisors is an integer number (1217940).

Almost surely, 2^9221213 is an apocalyptic number.

It is an amenable number.

9221213 is a deficient number, since it is larger than the sum of its proper divisors (522307).

9221213 is a wasteful number, since it uses less digits than its factorization.

9221213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1867.

The product of its digits is 216, while the sum is 20.

The square root of 9221213 is about 3036.6450237063. The cubic root of 9221213 is about 209.6988351182.

The spelling of 9221213 in words is "nine million, two hundred twenty-one thousand, two hundred thirteen".