243135212503 has 2 divisors, whose sum is σ = 243135212504. Its totient is φ = 243135212502.

The previous prime is 243135212497. The next prime is 243135212521. The reversal of 243135212503 is 305212531342.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 243135212503 - 2²⁹ = 242598341591 is a prime.

It is a super-2 number, since 2×243135212503² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (243135212543) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 121567606251 + 121567606252.

It is an arithmetic number, because the mean of its divisors is an integer number (121567606252).

Almost surely, 2^243135212503 is an apocalyptic number.

243135212503 is a deficient number, since it is larger than the sum of its proper divisors (1).

243135212503 is an equidigital number, since it uses as much as digits as its factorization.

243135212503 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 21600, while the sum is 31.

Adding to 243135212503 its reverse (305212531342), we get a palindrome (548347743845).

The spelling of 243135212503 in words is "two hundred forty-three billion, one hundred thirty-five million, two hundred twelve thousand, five hundred three".