33223212 has 108 divisors (see below), whose sum is σ = 95855760. Its totient is φ = 9683520.

The previous prime is 33223207. The next prime is 33223217. The reversal of 33223212 is 21232233.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (33223207) and next prime (33223217).

It is a super-2 number, since 2×33223212² = 2207563631193888, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (18).

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

It is not an unprimeable number, because it can be changed into a prime (33223217) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 126193 + ... + 126455.

Almost surely, 2^33223212 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 33223212, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (47927880).

33223212 is an abundant number, since it is smaller than the sum of its proper divisors (62632548).

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

33223212 is a wasteful number, since it uses less digits than its factorization.

33223212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 324 (or 308 counting only the distinct ones).

The product of its digits is 432, while the sum is 18.

The square root of 33223212 is about 5763.9580151143. The cubic root of 33223212 is about 321.4750006159.

Adding to 33223212 its reverse (21232233), we get a palindrome (54455445).

The spelling of 33223212 in words is "thirty-three million, two hundred twenty-three thousand, two hundred twelve".