33220213 has 8 divisors (see below), whose sum is σ = 36131256. Its totient is φ = 30360000.

The previous prime is 33220199. The next prime is 33220217. The reversal of 33220213 is 31202233.

It can be written as a sum of positive squares in 4 ways, for example, as 9474084 + 23746129 = 3078^2 + 4873^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 33220213 - 2⁵ = 33220181 is a prime.

It is a super-2 number, since 2×33220213² = 2207165103530738, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (33220217) 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 in 7 ways as a sum of consecutive naturals, for example, 11338 + ... + 13963.

It is an arithmetic number, because the mean of its divisors is an integer number (4516407).

Almost surely, 2^33220213 is an apocalyptic number.

It is an amenable number.

33220213 is a deficient number, since it is larger than the sum of its proper divisors (2911043).

33220213 is a wasteful number, since it uses less digits than its factorization.

33220213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25415.

The product of its (nonzero) digits is 216, while the sum is 16.

The square root of 33220213 is about 5763.6978581463. The cubic root of 33220213 is about 321.4653273335.

Adding to 33220213 its reverse (31202233), we get a palindrome (64422446).

It can be divided in two parts, 33220 and 213, that added together give a palindrome (33433).

The spelling of 33220213 in words is "thirty-three million, two hundred twenty thousand, two hundred thirteen".