243423230443213 has 2 divisors, whose sum is σ = 243423230443214. Its totient is φ = 243423230443212.

The previous prime is 243423230443139. The next prime is 243423230443231. The reversal of 243423230443213 is 312344032324342.

Together with next prime (243423230443231) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 184592520309289 + 58830710133924 = 13586483^2 + 7670118^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-243423230443213 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (243423290443213) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 121711615221606 + 121711615221607.

It is an arithmetic number, because the mean of its divisors is an integer number (121711615221607).

Almost surely, 2^{243423230443213} is an apocalyptic number.

It is an amenable number.

243423230443213 is a deficient number, since it is larger than the sum of its proper divisors (1).

243423230443213 is an equidigital number, since it uses as much as digits as its factorization.

243423230443213 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 995328, while the sum is 40.

Adding to 243423230443213 its reverse (312344032324342), we get a palindrome (555767262767555).

The spelling of 243423230443213 in words is "two hundred forty-three trillion, four hundred twenty-three billion, two hundred thirty million, four hundred forty-three thousand, two hundred thirteen".