33216013 has 2 divisors, whose sum is σ = 33216014. Its totient is φ = 33216012.

The previous prime is 33215999. The next prime is 33216031. The reversal of 33216013 is 31061233.

Together with next prime (33216031) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 33212169 + 3844 = 5763^2 + 62^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-33216013 is a prime.

It is a super-2 number, since 2×33216013² = 2206607039232338, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (33216613) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 16608006 + 16608007.

It is an arithmetic number, because the mean of its divisors is an integer number (16608007).

Almost surely, 2^33216013 is an apocalyptic number.

It is an amenable number.

33216013 is a deficient number, since it is larger than the sum of its proper divisors (1).

33216013 is an equidigital number, since it uses as much as digits as its factorization.

33216013 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 324, while the sum is 19.

The square root of 33216013 is about 5763.3334972045. Note that the first 3 decimals coincide. The cubic root of 33216013 is about 321.4517792438.

Adding to 33216013 its reverse (31061233), we get a palindrome (64277246).

The spelling of 33216013 in words is "thirty-three million, two hundred sixteen thousand, thirteen".