9211216 has 60 divisors (see below), whose sum is σ = 21486720. Its totient is φ = 3810240.

The previous prime is 9211207. The next prime is 9211231. The reversal of 9211216 is 6121129.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 24115 + ... + 24493.

It is an arithmetic number, because the mean of its divisors is an integer number (358112).

Almost surely, 2^9211216 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 9211216, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (10743360).

9211216 is an abundant number, since it is smaller than the sum of its proper divisors (12275504).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

9211216 is a wasteful number, since it uses less digits than its factorization.

9211216 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 432 (or 419 counting only the distinct ones).

The product of its digits is 216, while the sum is 22.

The square root of 9211216 is about 3034.9985172978. The cubic root of 9211216 is about 209.6230274022.

The spelling of 9211216 in words is "nine million, two hundred eleven thousand, two hundred sixteen".