243676504213 has 4 divisors (see below), whose sum is σ = 243733696108. Its totient is φ = 243619312320.

The previous prime is 243676504199. The next prime is 243676504241. The reversal of 243676504213 is 312405676342.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 219681564804 + 23994939409 = 468702^2 + 154903^2 .

It is a cyclic number.

It is not a de Polignac number, because 243676504213 - 2⁹ = 243676503701 is a prime.

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 243676504213.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (243676504243) 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, 28589556 + ... + 28598077.

It is an arithmetic number, because the mean of its divisors is an integer number (60933424027).

Almost surely, 2^243676504213 is an apocalyptic number.

It is an amenable number.

243676504213 is a deficient number, since it is larger than the sum of its proper divisors (57191895).

243676504213 is an equidigital number, since it uses as much as digits as its factorization.

243676504213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 57191894.

The product of its (nonzero) digits is 725760, while the sum is 43.

The spelling of 243676504213 in words is "two hundred forty-three billion, six hundred seventy-six million, five hundred four thousand, two hundred thirteen".