243433403320213 has 8 divisors (see below), whose sum is σ = 246137346963000. Its totient is φ = 240743728509888.

The previous prime is 243433403320199. The next prime is 243433403320309. The reversal of 243433403320213 is 312023304334342.

It can be written as a sum of positive squares in 4 ways, for example, as 22577483986929 + 220855919333284 = 4751577^2 + 14861222^2 .

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-243433403320213 is a prime.

It is a super-2 number, since 2×243433403320213² (a number of 30 digits) 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 (243433403320813) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3567173806 + ... + 3567242047.

It is an arithmetic number, because the mean of its divisors is an integer number (30767168370375).

Almost surely, 2^{243433403320213} is an apocalyptic number.

It is an amenable number.

243433403320213 is a deficient number, since it is larger than the sum of its proper divisors (2703943642787).

243433403320213 is a wasteful number, since it uses less digits than its factorization.

243433403320213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7134416231.

The product of its (nonzero) digits is 373248, while the sum is 37.

Adding to 243433403320213 its reverse (312023304334342), we get a palindrome (555456707654555).

The spelling of 243433403320213 in words is "two hundred forty-three trillion, four hundred thirty-three billion, four hundred three million, three hundred twenty thousand, two hundred thirteen".