243312163117 has 2 divisors, whose sum is σ = 243312163118. Its totient is φ = 243312163116.

The previous prime is 243312163109. The next prime is 243312163151. The reversal of 243312163117 is 711361213342.

243312163117 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an a-pointer prime, because the next prime (243312163151) can be obtained adding 243312163117 to its sum of digits (34).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 129463955721 + 113848207396 = 359811^2 + 337414^2 .

It is a cyclic number.

It is not a de Polignac number, because 243312163117 - 2³ = 243312163109 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (243312163177) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 121656081558 + 121656081559.

It is an arithmetic number, because the mean of its divisors is an integer number (121656081559).

Almost surely, 2^243312163117 is an apocalyptic number.

It is an amenable number.

243312163117 is a deficient number, since it is larger than the sum of its proper divisors (1).

243312163117 is an equidigital number, since it uses as much as digits as its factorization.

243312163117 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 18144, while the sum is 34.

Adding to 243312163117 its reverse (711361213342), we get a palindrome (954673376459).

The spelling of 243312163117 in words is "two hundred forty-three billion, three hundred twelve million, one hundred sixty-three thousand, one hundred seventeen".