33222216 has 64 divisors (see below), whose sum is σ = 88879680. Its totient is φ = 10311680.

The previous prime is 33222191. The next prime is 33222223. The reversal of 33222216 is 61222233.

It is a super-2 number, since 2×33222216² = 2207431271901312, which contains 22 as substring.

It is a nude number because it is divisible by every one of its digits.

It is a junction number, because it is equal to n+sod(n) for n = 33222192 and 33222201.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 43276 + ... + 44036.

It is an arithmetic number, because the mean of its divisors is an integer number (1388745).

Almost surely, 2^33222216 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 33222216, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (44439840).

33222216 is an abundant number, since it is smaller than the sum of its proper divisors (55657464).

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

33222216 is a wasteful number, since it uses less digits than its factorization.

33222216 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 894 (or 890 counting only the distinct ones).

The product of its digits is 864, while the sum is 21.

The square root of 33222216 is about 5763.8716155029. The cubic root of 33222216 is about 321.4717880798.

Adding to 33222216 its reverse (61222233), we get a palindrome (94444449).

The spelling of 33222216 in words is "thirty-three million, two hundred twenty-two thousand, two hundred sixteen".