33423221 has 4 divisors (see below), whose sum is σ = 35994252. Its totient is φ = 30852192.

The previous prime is 33423197. The next prime is 33423227. The reversal of 33423221 is 12232433.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 3556996 + 29866225 = 1886^2 + 5465^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-33423221 is a prime.

It is a super-2 number, since 2×33423221² = 2234223404029682, 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 = 33423193 and 33423202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (33423227) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1285496 + ... + 1285521.

It is an arithmetic number, because the mean of its divisors is an integer number (8998563).

Almost surely, 2^33423221 is an apocalyptic number.

It is an amenable number.

33423221 is a deficient number, since it is larger than the sum of its proper divisors (2571031).

33423221 is a wasteful number, since it uses less digits than its factorization.

33423221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2571030.

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

The square root of 33423221 is about 5781.2819512631. The cubic root of 33423221 is about 322.1188205189.

Adding to 33423221 its reverse (12232433), we get a palindrome (45655654).

The spelling of 33423221 in words is "thirty-three million, four hundred twenty-three thousand, two hundred twenty-one".