243335213 has 16 divisors (see below), whose sum is σ = 275208192. Its totient is φ = 213150000.

The previous prime is 243335203. The next prime is 243335219. The reversal of 243335213 is 312533342.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 243335213 - 2¹⁸ = 243073069 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (243335219) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 84170 + ... + 87012.

It is an arithmetic number, because the mean of its divisors is an integer number (17200512).

Almost surely, 2^243335213 is an apocalyptic number.

It is an amenable number.

243335213 is a deficient number, since it is larger than the sum of its proper divisors (31872979).

243335213 is a wasteful number, since it uses less digits than its factorization.

243335213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3136.

The product of its digits is 6480, while the sum is 26.

The square root of 243335213 is about 15599.2055246413. The cubic root of 243335213 is about 624.3119579283.

Adding to 243335213 its reverse (312533342), we get a palindrome (555868555).

The spelling of 243335213 in words is "two hundred forty-three million, three hundred thirty-five thousand, two hundred thirteen".