33223421 has 24 divisors (see below), whose sum is σ = 42993504. Its totient is φ = 25378080.

The previous prime is 33223417. The next prime is 33223429. The reversal of 33223421 is 12432233.

It is not a de Polignac number, because 33223421 - 2² = 33223417 is a prime.

It is a super-2 number, since 2×33223421² = 2207591405886482, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 33223393 and 33223402.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (33223429) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 27986 + ... + 29148.

It is an arithmetic number, because the mean of its divisors is an integer number (1791396).

Almost surely, 2^33223421 is an apocalyptic number.

It is an amenable number.

33223421 is a deficient number, since it is larger than the sum of its proper divisors (9770083).

33223421 is a wasteful number, since it uses less digits than its factorization.

33223421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1241 (or 1234 counting only the distinct ones).

The product of its digits is 864, while the sum is 20.

The square root of 33223421 is about 5763.9761449888. The cubic root of 33223421 is about 321.4756747243.

Adding to 33223421 its reverse (12432233), we get a palindrome (45655654).

The spelling of 33223421 in words is "thirty-three million, two hundred twenty-three thousand, four hundred twenty-one".