243033213 has 32 divisors (see below), whose sum is σ = 339655680. Its totient is φ = 154474880.

The previous prime is 243033191. The next prime is 243033221. The reversal of 243033213 is 312330342.

It is a cyclic number.

It is not a de Polignac number, because 243033213 - 2⁹ = 243032701 is a prime.

It is a super-2 number, since 2×243033213² = 118130285242206738, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 243033213.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (243033013) 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 31 ways as a sum of consecutive naturals, for example, 1042945 + ... + 1043177.

It is an arithmetic number, because the mean of its divisors is an integer number (10614240).

Almost surely, 2^243033213 is an apocalyptic number.

It is an amenable number.

243033213 is a deficient number, since it is larger than the sum of its proper divisors (96622467).

243033213 is a wasteful number, since it uses less digits than its factorization.

243033213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 449.

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

The square root of 243033213 is about 15589.5225391928. The cubic root of 243033213 is about 624.0535760006.

Adding to 243033213 its reverse (312330342), we get a palindrome (555363555).

The spelling of 243033213 in words is "two hundred forty-three million, thirty-three thousand, two hundred thirteen".