243115155011 has 2 divisors, whose sum is σ = 243115155012. Its totient is φ = 243115155010.

The previous prime is 243115154983. The next prime is 243115155163. The reversal of 243115155011 is 110551511342.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-243115155011 is a prime.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (243115154011) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 121557577505 + 121557577506.

It is an arithmetic number, because the mean of its divisors is an integer number (121557577506).

Almost surely, 2^243115155011 is an apocalyptic number.

243115155011 is a deficient number, since it is larger than the sum of its proper divisors (1).

243115155011 is an equidigital number, since it uses as much as digits as its factorization.

243115155011 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3000, while the sum is 29.

Adding to 243115155011 its reverse (110551511342), we get a palindrome (353666666353).

The spelling of 243115155011 in words is "two hundred forty-three billion, one hundred fifteen million, one hundred fifty-five thousand, eleven".