243115404347 has 2 divisors, whose sum is σ = 243115404348. Its totient is φ = 243115404346.

The previous prime is 243115404283. The next prime is 243115404391. The reversal of 243115404347 is 743404511342.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 243115404347 - 2⁶ = 243115404283 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 243115404347.

It is not a weakly prime, because it can be changed into another prime (243115434347) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 121557702173 + 121557702174.

It is an arithmetic number, because the mean of its divisors is an integer number (121557702174).

Almost surely, 2^243115404347 is an apocalyptic number.

243115404347 is a deficient number, since it is larger than the sum of its proper divisors (1).

243115404347 is an equidigital number, since it uses as much as digits as its factorization.

243115404347 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 161280, while the sum is 38.

Adding to 243115404347 its reverse (743404511342), we get a palindrome (986519915689).

The spelling of 243115404347 in words is "two hundred forty-three billion, one hundred fifteen million, four hundred four thousand, three hundred forty-seven".