243203114417 has 2 divisors, whose sum is σ = 243203114418. Its totient is φ = 243203114416.

The previous prime is 243203114369. The next prime is 243203114471. The reversal of 243203114417 is 714411302342.

Together with next prime (243203114471) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 198629771041 + 44573343376 = 445679^2 + 211124^2 .

It is a cyclic number.

It is not a de Polignac number, because 243203114417 - 2⁶ = 243203114353 is a prime.

It is not a weakly prime, because it can be changed into another prime (243203114317) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 121601557208 + 121601557209.

It is an arithmetic number, because the mean of its divisors is an integer number (121601557209).

Almost surely, 2^243203114417 is an apocalyptic number.

It is an amenable number.

243203114417 is a deficient number, since it is larger than the sum of its proper divisors (1).

243203114417 is an equidigital number, since it uses as much as digits as its factorization.

243203114417 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 16128, while the sum is 32.

Adding to 243203114417 its reverse (714411302342), we get a palindrome (957614416759).

The spelling of 243203114417 in words is "two hundred forty-three billion, two hundred three million, one hundred fourteen thousand, four hundred seventeen".