33433021 has 2 divisors, whose sum is σ = 33433022. Its totient is φ = 33433020.

The previous prime is 33433019. The next prime is 33433073. The reversal of 33433021 is 12033433.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 32649796 + 783225 = 5714^2 + 885^2 .

It is a cyclic number.

It is not a de Polignac number, because 33433021 - 2¹ = 33433019 is a prime.

It is a super-2 number, since 2×33433021² = 2235533786372882, which contains 22 as substring.

Together with 33433019, it forms a pair of twin primes.

It is a self number, because there is not a number n which added to its sum of digits gives 33433021.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (33433321) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 16716510 + 16716511.

It is an arithmetic number, because the mean of its divisors is an integer number (16716511).

Almost surely, 2^33433021 is an apocalyptic number.

It is an amenable number.

33433021 is a deficient number, since it is larger than the sum of its proper divisors (1).

33433021 is an equidigital number, since it uses as much as digits as its factorization.

33433021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 648, while the sum is 19.

The square root of 33433021 is about 5782.1294520272. The cubic root of 33433021 is about 322.1503001894.

Adding to 33433021 its reverse (12033433), we get a palindrome (45466454).

The spelling of 33433021 in words is "thirty-three million, four hundred thirty-three thousand, twenty-one".