33304221 has 12 divisors (see below), whose sum is σ = 48159072. Its totient is φ = 22178376.

The previous prime is 33304217. The next prime is 33304223. The reversal of 33304221 is 12240333.

It is not a de Polignac number, because 33304221 - 2² = 33304217 is a prime.

It is a super-2 number, since 2×33304221² = 2218342272833682, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 33304194 and 33304203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (33304223) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 10950 + ... + 13656.

It is an arithmetic number, because the mean of its divisors is an integer number (4013256).

Almost surely, 2^33304221 is an apocalyptic number.

It is an amenable number.

33304221 is a deficient number, since it is larger than the sum of its proper divisors (14854851).

33304221 is a wasteful number, since it uses less digits than its factorization.

33304221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4080 (or 4077 counting only the distinct ones).

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

The square root of 33304221 is about 5770.9809391472. The cubic root of 33304221 is about 321.7360754167.

Adding to 33304221 its reverse (12240333), we get a palindrome (45544554).

The spelling of 33304221 in words is "thirty-three million, three hundred four thousand, two hundred twenty-one".