9217216 has 28 divisors (see below), whose sum is σ = 18608040. Its totient is φ = 4528640.

The previous prime is 9217211. The next prime is 9217237. The reversal of 9217216 is 6127129.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (9217211) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2556 + ... + 4996.

Almost surely, 2^9217216 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 9217216, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (9304020).

9217216 is an abundant number, since it is smaller than the sum of its proper divisors (9390824).

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

9217216 is a wasteful number, since it uses less digits than its factorization.

9217216 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2512 (or 2502 counting only the distinct ones).

The product of its digits is 1512, while the sum is 28.

The square root of 9217216 is about 3035.9868247408. The cubic root of 9217216 is about 209.6685322583.

The spelling of 9217216 in words is "nine million, two hundred seventeen thousand, two hundred sixteen".