242135531243 has 2 divisors, whose sum is σ = 242135531244. Its totient is φ = 242135531242.

The previous prime is 242135531219. The next prime is 242135531263. The reversal of 242135531243 is 342135531242.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-242135531243 is a prime.

It is not a weakly prime, because it can be changed into another prime (242135531263) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 121067765621 + 121067765622.

It is an arithmetic number, because the mean of its divisors is an integer number (121067765622).

Almost surely, 2^242135531243 is an apocalyptic number.

242135531243 is a deficient number, since it is larger than the sum of its proper divisors (1).

242135531243 is an equidigital number, since it uses as much as digits as its factorization.

242135531243 is an evil number, because the sum of its binary digits is even.

The product of its digits is 86400, while the sum is 35.

Subtracting 242135531243 from its reverse (342135531242), we obtain a palindrome (99999999999).

The spelling of 242135531243 in words is "two hundred forty-two billion, one hundred thirty-five million, five hundred thirty-one thousand, two hundred forty-three".