1313563454243 has 4 divisors (see below), whose sum is σ = 1355936468928. Its totient is φ = 1271190439560.

The previous prime is 1313563454239. The next prime is 1313563454323. The reversal of 1313563454243 is 3424543653131.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1313563454243 - 2² = 1313563454239 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1313563454194 and 1313563454203.

It is not an unprimeable number, because it can be changed into a prime (1313563454543) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 21186507296 + ... + 21186507357.

It is an arithmetic number, because the mean of its divisors is an integer number (338984117232).

Almost surely, 2^{1313563454243} is an apocalyptic number.

1313563454243 is a deficient number, since it is larger than the sum of its proper divisors (42373014685).

1313563454243 is an equidigital number, since it uses as much as digits as its factorization.

1313563454243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42373014684.

The product of its digits is 1555200, while the sum is 44.

The spelling of 1313563454243 in words is "one trillion, three hundred thirteen billion, five hundred sixty-three million, four hundred fifty-four thousand, two hundred forty-three".