1312155423343 has 2 divisors, whose sum is σ = 1312155423344. Its totient is φ = 1312155423342.

The previous prime is 1312155423323. The next prime is 1312155423347. The reversal of 1312155423343 is 3433245512131.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1312155423343 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1312155423347) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 656077711671 + 656077711672.

It is an arithmetic number, because the mean of its divisors is an integer number (656077711672).

Almost surely, 2^{1312155423343} is an apocalyptic number.

1312155423343 is a deficient number, since it is larger than the sum of its proper divisors (1).

1312155423343 is an equidigital number, since it uses as much as digits as its factorization.

1312155423343 is an evil number, because the sum of its binary digits is even.

The product of its digits is 129600, while the sum is 37.

The spelling of 1312155423343 in words is "one trillion, three hundred twelve billion, one hundred fifty-five million, four hundred twenty-three thousand, three hundred forty-three".