1312003431 has 12 divisors (see below), whose sum is σ = 1895554752. Its totient is φ = 874466496.

The previous prime is 1312003397. The next prime is 1312003439. The reversal of 1312003431 is 1343002131.

1312003431 is a `hidden beast` number, since 1 + 31 + 200 + 3 + 431 = 666.

It is not a de Polignac number, because 1312003431 - 2¹⁸ = 1311741287 is a prime.

It is a super-2 number, since 2×1312003431² = 3442706005911543522, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1312003439) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 31455 + ... + 60111.

It is an arithmetic number, because the mean of its divisors is an integer number (157962896).

Almost surely, 2^1312003431 is an apocalyptic number.

1312003431 is a deficient number, since it is larger than the sum of its proper divisors (583551321).

1312003431 is a wasteful number, since it uses less digits than its factorization.

1312003431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33750 (or 33747 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 18.

The square root of 1312003431 is about 36221.5879138394. The cubic root of 1312003431 is about 1094.7416892412.

Adding to 1312003431 its reverse (1343002131), we get a palindrome (2655005562).

The spelling of 1312003431 in words is "one billion, three hundred twelve million, three thousand, four hundred thirty-one".