243144313 has 2 divisors, whose sum is σ = 243144314. Its totient is φ = 243144312.

The previous prime is 243144299. The next prime is 243144379. The reversal of 243144313 is 313441342.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 123832384 + 119311929 = 11128^2 + 10923^2 .

It is a cyclic number.

It is not a de Polignac number, because 243144313 - 2⁵ = 243144281 is a prime.

It is not a weakly prime, because it can be changed into another prime (243544313) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 121572156 + 121572157.

It is an arithmetic number, because the mean of its divisors is an integer number (121572157).

Almost surely, 2^243144313 is an apocalyptic number.

It is an amenable number.

243144313 is a deficient number, since it is larger than the sum of its proper divisors (1).

243144313 is an equidigital number, since it uses as much as digits as its factorization.

243144313 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3456, while the sum is 25.

The square root of 243144313 is about 15593.0854227122. The cubic root of 243144313 is about 624.1486546242.

Adding to 243144313 its reverse (313441342), we get a palindrome (556585655).

The spelling of 243144313 in words is "two hundred forty-three million, one hundred forty-four thousand, three hundred thirteen".