33204421 has 2 divisors, whose sum is σ = 33204422. Its totient is φ = 33204420.

The previous prime is 33204403. The next prime is 33204427. The reversal of 33204421 is 12440233.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 26884225 + 6320196 = 5185^2 + 2514^2 .

It is a cyclic number.

It is not a de Polignac number, because 33204421 - 2⁷ = 33204293 is a prime.

It is a super-2 number, since 2×33204421² = 2205067147890482, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (33204427) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 16602210 + 16602211.

It is an arithmetic number, because the mean of its divisors is an integer number (16602211).

Almost surely, 2^33204421 is an apocalyptic number.

It is an amenable number.

33204421 is a deficient number, since it is larger than the sum of its proper divisors (1).

33204421 is an equidigital number, since it uses as much as digits as its factorization.

33204421 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 576, while the sum is 19.

The square root of 33204421 is about 5762.3277414600. The cubic root of 33204421 is about 321.4143805892.

Adding to 33204421 its reverse (12440233), we get a palindrome (45644654).

The spelling of 33204421 in words is "thirty-three million, two hundred four thousand, four hundred twenty-one".