33221344 has 36 divisors (see below), whose sum is σ = 70834176. Its totient is φ = 15330432.

The previous prime is 33221341. The next prime is 33221369. The reversal of 33221344 is 44312233.

It is a happy number.

It is a super-2 number, since 2×33221344² = 2207315394332672, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (33221341) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2337 + ... + 8479.

It is an arithmetic number, because the mean of its divisors is an integer number (1967616).

Almost surely, 2^33221344 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 33221344, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (35417088).

33221344 is an abundant number, since it is smaller than the sum of its proper divisors (37612832).

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

33221344 is a wasteful number, since it uses less digits than its factorization.

33221344 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6179 (or 6158 counting only the distinct ones).

The product of its digits is 1728, while the sum is 22.

The square root of 33221344 is about 5763.7959714063. The cubic root of 33221344 is about 321.4689754453.

Adding to 33221344 its reverse (44312233), we get a palindrome (77533577).

The spelling of 33221344 in words is "thirty-three million, two hundred twenty-one thousand, three hundred forty-four".