243017404315541 has 2 divisors, whose sum is σ = 243017404315542. Its totient is φ = 243017404315540.

The previous prime is 243017404315489. The next prime is 243017404315603. The reversal of 243017404315541 is 145513404710342.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 140973970576516 + 102043433739025 = 11873246^2 + 10101655^2 .

It is a cyclic number.

It is not a de Polignac number, because 243017404315541 - 2¹⁴ = 243017404299157 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 243017404315492 and 243017404315501.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (243017404314541) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 121508702157770 + 121508702157771.

It is an arithmetic number, because the mean of its divisors is an integer number (121508702157771).

Almost surely, 2^{243017404315541} is an apocalyptic number.

It is an amenable number.

243017404315541 is a deficient number, since it is larger than the sum of its proper divisors (1).

243017404315541 is an equidigital number, since it uses as much as digits as its factorization.

243017404315541 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 806400, while the sum is 44.

The spelling of 243017404315541 in words is "two hundred forty-three trillion, seventeen billion, four hundred four million, three hundred fifteen thousand, five hundred forty-one".