1312331400243 has 12 divisors (see below), whose sum is σ = 1995357684840. Its totient is φ = 828840884256.

The previous prime is 1312331400209. The next prime is 1312331400271. The reversal of 1312331400243 is 3420041332131.

It is a happy number.

1312331400243 is a `hidden beast` number, since 1 + 3 + 1 + 233 + 1 + 400 + 24 + 3 = 666.

It is not a de Polignac number, because 1312331400243 - 2¹⁰ = 1312331399219 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1312331400343) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3837226146 + ... + 3837226487.

It is an arithmetic number, because the mean of its divisors is an integer number (166279807070).

Almost surely, 2^{1312331400243} is an apocalyptic number.

1312331400243 is a deficient number, since it is larger than the sum of its proper divisors (683026284597).

1312331400243 is a wasteful number, since it uses less digits than its factorization.

1312331400243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7674452658 (or 7674452655 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 27.

Adding to 1312331400243 its reverse (3420041332131), we get a palindrome (4732372732374).

The spelling of 1312331400243 in words is "one trillion, three hundred twelve billion, three hundred thirty-one million, four hundred thousand, two hundred forty-three".