1311423406523 has 2 divisors, whose sum is σ = 1311423406524. Its totient is φ = 1311423406522.

The previous prime is 1311423406519. The next prime is 1311423406529. The reversal of 1311423406523 is 3256043241131.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1311423406523 - 2² = 1311423406519 is a prime.

It is not a weakly prime, because it can be changed into another prime (1311423406529) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 655711703261 + 655711703262.

It is an arithmetic number, because the mean of its divisors is an integer number (655711703262).

Almost surely, 2^{1311423406523} is an apocalyptic number.

1311423406523 is a deficient number, since it is larger than the sum of its proper divisors (1).

1311423406523 is an equidigital number, since it uses as much as digits as its factorization.

1311423406523 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 51840, while the sum is 35.

Adding to 1311423406523 its reverse (3256043241131), we get a palindrome (4567466647654).

The spelling of 1311423406523 in words is "one trillion, three hundred eleven billion, four hundred twenty-three million, four hundred six thousand, five hundred twenty-three".