243431230369 has 2 divisors, whose sum is σ = 243431230370. Its totient is φ = 243431230368.

The previous prime is 243431230333. The next prime is 243431230373. The reversal of 243431230369 is 963032134342.

243431230369 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 144198670225 + 99232560144 = 379735^2 + 315012^2 .

It is a cyclic number.

It is not a de Polignac number, because 243431230369 - 2¹⁹ = 243430706081 is a prime.

It is a super-2 number, since 2×243431230369² (a number of 24 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (243431230319) 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, 121715615184 + 121715615185.

It is an arithmetic number, because the mean of its divisors is an integer number (121715615185).

Almost surely, 2^243431230369 is an apocalyptic number.

It is an amenable number.

243431230369 is a deficient number, since it is larger than the sum of its proper divisors (1).

243431230369 is an equidigital number, since it uses as much as digits as its factorization.

243431230369 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 279936, while the sum is 40.

The spelling of 243431230369 in words is "two hundred forty-three billion, four hundred thirty-one million, two hundred thirty thousand, three hundred sixty-nine".