1312131344 has 20 divisors (see below), whose sum is σ = 2555432796. Its totient is φ = 652664832.

The previous prime is 1312131343. The next prime is 1312131367. The reversal of 1312131344 is 4431312131.

It can be written as a sum of positive squares in 2 ways, for example, as 269616400 + 1042514944 = 16420^2 + 32288^2 .

It is not an unprimeable number, because it can be changed into a prime (1312131343) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 209369 + ... + 215544.

Almost surely, 2^1312131344 is an apocalyptic number.

It is an amenable number.

1312131344 is a deficient number, since it is larger than the sum of its proper divisors (1243301452).

1312131344 is a wasteful number, since it uses less digits than its factorization.

1312131344 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 425114 (or 425108 counting only the distinct ones).

The product of its digits is 864, while the sum is 23.

The square root of 1312131344 is about 36223.3535719707. The cubic root of 1312131344 is about 1094.7772651500. Note that the first 3 decimals are identical.

Adding to 1312131344 its reverse (4431312131), we get a palindrome (5743443475).

The spelling of 1312131344 in words is "one billion, three hundred twelve million, one hundred thirty-one thousand, three hundred forty-four".