243245455513 has 2 divisors, whose sum is σ = 243245455514. Its totient is φ = 243245455512.

The previous prime is 243245455511. The next prime is 243245455517. The reversal of 243245455513 is 315554542342.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 209693473929 + 33551981584 = 457923^2 + 183172^2 .

It is a cyclic number.

It is not a de Polignac number, because 243245455513 - 2¹ = 243245455511 is a prime.

Together with 243245455511, it forms a pair of twin primes.

It is a self number, because there is not a number n which added to its sum of digits gives 243245455513.

It is not a weakly prime, because it can be changed into another prime (243245455511) 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, 121622727756 + 121622727757.

It is an arithmetic number, because the mean of its divisors is an integer number (121622727757).

Almost surely, 2^243245455513 is an apocalyptic number.

It is an amenable number.

243245455513 is a deficient number, since it is larger than the sum of its proper divisors (1).

243245455513 is an equidigital number, since it uses as much as digits as its factorization.

243245455513 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1440000, while the sum is 43.

Adding to 243245455513 its reverse (315554542342), we get a palindrome (558799997855).

The spelling of 243245455513 in words is "two hundred forty-three billion, two hundred forty-five million, four hundred fifty-five thousand, five hundred thirteen".