313231133221243 has 2 divisors, whose sum is σ = 313231133221244. Its totient is φ = 313231133221242.

The previous prime is 313231133221217. The next prime is 313231133221333. The reversal of 313231133221243 is 342122331132313.

It is a weak prime.

It is an emirp because it is prime and its reverse (342122331132313) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 313231133221243 - 2¹³ = 313231133213051 is a prime.

It is a super-2 number, since 2×313231133221243² (a number of 30 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 313231133221199 and 313231133221208.

It is not a weakly prime, because it can be changed into another prime (313231133221943) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 156615566610621 + 156615566610622.

It is an arithmetic number, because the mean of its divisors is an integer number (156615566610622).

Almost surely, 2^{313231133221243} is an apocalyptic number.

313231133221243 is a deficient number, since it is larger than the sum of its proper divisors (1).

313231133221243 is an equidigital number, since it uses as much as digits as its factorization.

313231133221243 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 46656, while the sum is 34.

Adding to 313231133221243 its reverse (342122331132313), we get a palindrome (655353464353556).

The spelling of 313231133221243 in words is "three hundred thirteen trillion, two hundred thirty-one billion, one hundred thirty-three million, two hundred twenty-one thousand, two hundred forty-three".