243398226641 has 2 divisors, whose sum is σ = 243398226642. Its totient is φ = 243398226640.

The previous prime is 243398226629. The next prime is 243398226661. The reversal of 243398226641 is 146622893342.

It is a happy number.

243398226641 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 209577177616 + 33821049025 = 457796^2 + 183905^2 .

It is a cyclic number.

It is not a de Polignac number, because 243398226641 - 2³⁰ = 242324484817 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 243398226641.

It is not a weakly prime, because it can be changed into another prime (243398226611) 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, 121699113320 + 121699113321.

It is an arithmetic number, because the mean of its divisors is an integer number (121699113321).

Almost surely, 2^243398226641 is an apocalyptic number.

It is an amenable number.

243398226641 is a deficient number, since it is larger than the sum of its proper divisors (1).

243398226641 is an equidigital number, since it uses as much as digits as its factorization.

243398226641 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2985984, while the sum is 50.

The spelling of 243398226641 in words is "two hundred forty-three billion, three hundred ninety-eight million, two hundred twenty-six thousand, six hundred forty-one".