33338021 has 2 divisors, whose sum is σ = 33338022. Its totient is φ = 33338020.

The previous prime is 33337981. The next prime is 33338033. The reversal of 33338021 is 12083333.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 32615521 + 722500 = 5711^2 + 850^2 .

It is a cyclic number.

It is not a de Polignac number, because 33338021 - 2⁶ = 33337957 is a prime.

It is a super-2 number, since 2×33338021² = 2222847288392882, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (33338621) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 16669010 + 16669011.

It is an arithmetic number, because the mean of its divisors is an integer number (16669011).

Almost surely, 2^33338021 is an apocalyptic number.

It is an amenable number.

33338021 is a deficient number, since it is larger than the sum of its proper divisors (1).

33338021 is an equidigital number, since it uses as much as digits as its factorization.

33338021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1296, while the sum is 23.

The square root of 33338021 is about 5773.9086414664. The cubic root of 33338021 is about 321.8448804694.

The spelling of 33338021 in words is "thirty-three million, three hundred thirty-eight thousand, twenty-one".