243115021243 has 2 divisors, whose sum is σ = 243115021244. Its totient is φ = 243115021242.

The previous prime is 243115021159. The next prime is 243115021249. The reversal of 243115021243 is 342120511342.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 243115021243 - 2¹³ = 243115013051 is a prime.

It is not a weakly prime, because it can be changed into another prime (243115021249) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 121557510621 + 121557510622.

It is an arithmetic number, because the mean of its divisors is an integer number (121557510622).

Almost surely, 2^243115021243 is an apocalyptic number.

243115021243 is a deficient number, since it is larger than the sum of its proper divisors (1).

243115021243 is an equidigital number, since it uses as much as digits as its factorization.

243115021243 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5760, while the sum is 28.

Adding to 243115021243 its reverse (342120511342), we get a palindrome (585235532585).

The spelling of 243115021243 in words is "two hundred forty-three billion, one hundred fifteen million, twenty-one thousand, two hundred forty-three".