33320213 has 4 divisors (see below), whose sum is σ = 33866508. Its totient is φ = 32773920.

The previous prime is 33320171. The next prime is 33320219. The reversal of 33320213 is 31202333.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 31202333 = 191 ⋅163363.

It can be written as a sum of positive squares in 2 ways, for example, as 407044 + 32913169 = 638^2 + 5737^2 .

It is a cyclic number.

It is not a de Polignac number, because 33320213 - 2⁶ = 33320149 is a prime.

It is a super-2 number, since 2×33320213² = 2220473188730738, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 33320191 and 33320200.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (33320219) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 273056 + ... + 273177.

It is an arithmetic number, because the mean of its divisors is an integer number (8466627).

Almost surely, 2^33320213 is an apocalyptic number.

It is an amenable number.

33320213 is a deficient number, since it is larger than the sum of its proper divisors (546295).

33320213 is an equidigital number, since it uses as much as digits as its factorization.

33320213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 546294.

The product of its (nonzero) digits is 324, while the sum is 17.

The square root of 33320213 is about 5772.3663258667. The cubic root of 33320213 is about 321.7875641854.

Adding to 33320213 its reverse (31202333), we get a palindrome (64522546).

It can be divided in two parts, 33320 and 213, that added together give a palindrome (33533).

The spelling of 33320213 in words is "thirty-three million, three hundred twenty thousand, two hundred thirteen".