1318231522871 has 2 divisors, whose sum is σ = 1318231522872. Its totient is φ = 1318231522870.

The previous prime is 1318231522789. The next prime is 1318231522877. The reversal of 1318231522871 is 1782251328131.

It is a happy number.

It is a strong prime.

It is an emirp because it is prime and its reverse (1782251328131) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1318231522871 - 2¹⁸ = 1318231260727 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1318231522877) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 659115761435 + 659115761436.

It is an arithmetic number, because the mean of its divisors is an integer number (659115761436).

Almost surely, 2^{1318231522871} is an apocalyptic number.

1318231522871 is a deficient number, since it is larger than the sum of its proper divisors (1).

1318231522871 is an equidigital number, since it uses as much as digits as its factorization.

1318231522871 is an evil number, because the sum of its binary digits is even.

The product of its digits is 161280, while the sum is 44.

The spelling of 1318231522871 in words is "one trillion, three hundred eighteen billion, two hundred thirty-one million, five hundred twenty-two thousand, eight hundred seventy-one".