33421224 has 64 divisors (see below), whose sum is σ = 89280000. Its totient is φ = 10402560.

The previous prime is 33421189. The next prime is 33421237. The reversal of 33421224 is 42212433.

It is a super-2 number, since 2×33421224² = 2233956427316352, which contains 22 as substring.

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

It is a self number, because there is not a number n which added to its sum of digits gives 33421224.

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, 20802 + ... + 22350.

It is an arithmetic number, because the mean of its divisors is an integer number (1395000).

Almost surely, 2^33421224 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 33421224, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (44640000).

33421224 is an abundant number, since it is smaller than the sum of its proper divisors (55858776).

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

33421224 is a wasteful number, since it uses less digits than its factorization.

33421224 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1618 (or 1614 counting only the distinct ones).

The product of its digits is 1152, while the sum is 21.

The square root of 33421224 is about 5781.1092361242. The cubic root of 33421224 is about 322.1124049782.

Adding to 33421224 its reverse (42212433), we get a palindrome (75633657).

The spelling of 33421224 in words is "thirty-three million, four hundred twenty-one thousand, two hundred twenty-four".