243226207817 has 2 divisors, whose sum is σ = 243226207818. Its totient is φ = 243226207816.

The previous prime is 243226207811. The next prime is 243226207823. The reversal of 243226207817 is 718702622342.

It is a balanced prime because it is at equal distance from previous prime (243226207811) and next prime (243226207823).

It can be written as a sum of positive squares in only one way, i.e., 200438871616 + 42787336201 = 447704^2 + 206851^2 .

It is a cyclic number.

It is not a de Polignac number, because 243226207817 - 2¹⁴ = 243226191433 is a prime.

It is not a weakly prime, because it can be changed into another prime (243226207811) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 121613103908 + 121613103909.

It is an arithmetic number, because the mean of its divisors is an integer number (121613103909).

Almost surely, 2^243226207817 is an apocalyptic number.

It is an amenable number.

243226207817 is a deficient number, since it is larger than the sum of its proper divisors (1).

243226207817 is an equidigital number, since it uses as much as digits as its factorization.

243226207817 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 451584, while the sum is 44.

The spelling of 243226207817 in words is "two hundred forty-three billion, two hundred twenty-six million, two hundred seven thousand, eight hundred seventeen".