1312031312 has 20 divisors (see below), whose sum is σ = 2568270516. Its totient is φ = 649251840.

The previous prime is 1312031293. The next prime is 1312031323. The reversal of 1312031312 is 2131302131.

It can be written as a sum of positive squares in 2 ways, for example, as 300536896 + 1011494416 = 17336^2 + 31804^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 421139 + ... + 424242.

Almost surely, 2^1312031312 is an apocalyptic number.

It is an amenable number.

1312031312 is a deficient number, since it is larger than the sum of its proper divisors (1256239204).

1312031312 is an equidigital number, since it uses as much as digits as its factorization.

1312031312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 845486 (or 845480 counting only the distinct ones).

The product of its (nonzero) digits is 108, while the sum is 17.

The square root of 1312031312 is about 36221.9727789639. The cubic root of 1312031312 is about 1094.7494438645.

Adding to 1312031312 its reverse (2131302131), we get a palindrome (3443333443).

The spelling of 1312031312 in words is "one billion, three hundred twelve million, thirty-one thousand, three hundred twelve".