33068221 has 2 divisors, whose sum is σ = 33068222. Its totient is φ = 33068220.

The previous prime is 33068219. The next prime is 33068249. The reversal of 33068221 is 12286033.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 23145721 + 9922500 = 4811^2 + 3150^2 .

It is an emirp because it is prime and its reverse (12286033) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 33068221 - 2¹ = 33068219 is a prime.

Together with 33068219, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (33068201) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 16534110 + 16534111.

It is an arithmetic number, because the mean of its divisors is an integer number (16534111).

Almost surely, 2^33068221 is an apocalyptic number.

It is an amenable number.

33068221 is a deficient number, since it is larger than the sum of its proper divisors (1).

33068221 is an equidigital number, since it uses as much as digits as its factorization.

33068221 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1728, while the sum is 25.

The square root of 33068221 is about 5750.4974567423. The cubic root of 33068221 is about 320.9743123759.

The spelling of 33068221 in words is "thirty-three million, sixty-eight thousand, two hundred twenty-one".