9218216 has 64 divisors (see below), whose sum is σ = 21876480. Its totient is φ = 3548160.

The previous prime is 9218213. The next prime is 9218257. The reversal of 9218216 is 6128129.

It is a hoax number, since the sum of its digits (29) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (9218213) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 21686 + ... + 22106.

It is an arithmetic number, because the mean of its divisors is an integer number (341820).

Almost surely, 2^9218216 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 9218216, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (10938240).

9218216 is an abundant number, since it is smaller than the sum of its proper divisors (12658264).

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

9218216 is a wasteful number, since it uses less digits than its factorization.

9218216 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 474 (or 470 counting only the distinct ones).

The product of its digits is 1728, while the sum is 29.

The square root of 9218216 is about 3036.1515113709. The cubic root of 9218216 is about 209.6761144809.

The spelling of 9218216 in words is "nine million, two hundred eighteen thousand, two hundred sixteen".