1313224243237 has 2 divisors, whose sum is σ = 1313224243238. Its totient is φ = 1313224243236.

The previous prime is 1313224243229. The next prime is 1313224243291. The reversal of 1313224243237 is 7323424223131.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 976788282276 + 336435960961 = 988326^2 + 580031^2 .

It is a cyclic number.

It is not a de Polignac number, because 1313224243237 - 2³ = 1313224243229 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1313224243196 and 1313224243205.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1313224243207) 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, 656612121618 + 656612121619.

It is an arithmetic number, because the mean of its divisors is an integer number (656612121619).

Almost surely, 2^{1313224243237} is an apocalyptic number.

It is an amenable number.

1313224243237 is a deficient number, since it is larger than the sum of its proper divisors (1).

1313224243237 is an equidigital number, since it uses as much as digits as its factorization.

1313224243237 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 145152, while the sum is 37.

Adding to 1313224243237 its reverse (7323424223131), we get a palindrome (8636648466368).

The spelling of 1313224243237 in words is "one trillion, three hundred thirteen billion, two hundred twenty-four million, two hundred forty-three thousand, two hundred thirty-seven".