243243434112317 has 2 divisors, whose sum is σ = 243243434112318. Its totient is φ = 243243434112316.

The previous prime is 243243434112299. The next prime is 243243434112377. The reversal of 243243434112317 is 713211434342342.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 181240817930041 + 62002616182276 = 13462571^2 + 7874174^2 .

It is a cyclic number.

It is not a de Polignac number, because 243243434112317 - 2¹⁸ = 243243433850173 is a prime.

It is a super-2 number, since 2×243243434112317² (a number of 30 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (243243434112377) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 121621717056158 + 121621717056159.

It is an arithmetic number, because the mean of its divisors is an integer number (121621717056159).

Almost surely, 2^{243243434112317} is an apocalyptic number.

It is an amenable number.

243243434112317 is a deficient number, since it is larger than the sum of its proper divisors (1).

243243434112317 is an equidigital number, since it uses as much as digits as its factorization.

243243434112317 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1161216, while the sum is 44.

Adding to 243243434112317 its reverse (713211434342342), we get a palindrome (956454868454659).

The spelling of 243243434112317 in words is "two hundred forty-three trillion, two hundred forty-three billion, four hundred thirty-four million, one hundred twelve thousand, three hundred seventeen".