33243213 has 8 divisors (see below), whose sum is σ = 44351008. Its totient is φ = 22148784.

The previous prime is 33243209. The next prime is 33243229. The reversal of 33243213 is 31234233.

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

It is not a de Polignac number, because 33243213 - 2² = 33243209 is a prime.

It is a super-2 number, since 2×33243213² = 2210222421126738, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 33243213.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (33243233) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7395 + ... + 11007.

It is an arithmetic number, because the mean of its divisors is an integer number (5543876).

Almost surely, 2^33243213 is an apocalyptic number.

It is an amenable number.

33243213 is a deficient number, since it is larger than the sum of its proper divisors (11107795).

33243213 is a wasteful number, since it uses less digits than its factorization.

33243213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6683.

The product of its digits is 1296, while the sum is 21.

The square root of 33243213 is about 5765.6927597644. The cubic root of 33243213 is about 321.5394990117.

Adding to 33243213 its reverse (31234233), we get a palindrome (64477446).

The spelling of 33243213 in words is "thirty-three million, two hundred forty-three thousand, two hundred thirteen".