1311313312 has 12 divisors (see below), whose sum is σ = 2581648146. Its totient is φ = 655656640.

The previous prime is 1311313307. The next prime is 1311313313. The reversal of 1311313312 is 2133131131.

It can be written as a sum of positive squares in only one way, i.e., 1310729616 + 583696 = 36204^2 + 764^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 1311313312.

It is not an unprimeable number, because it can be changed into a prime (1311313313) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20489239 + ... + 20489302.

Almost surely, 2^1311313312 is an apocalyptic number.

It is an amenable number.

1311313312 is a deficient number, since it is larger than the sum of its proper divisors (1270334834).

1311313312 is an equidigital number, since it uses as much as digits as its factorization.

1311313312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40978551 (or 40978543 counting only the distinct ones).

The product of its digits is 162, while the sum is 19.

The square root of 1311313312 is about 36212.0603114487. The cubic root of 1311313312 is about 1094.5497094221.

Adding to 1311313312 its reverse (2133131131), we get a palindrome (3444444443).

The spelling of 1311313312 in words is "one billion, three hundred eleven million, three hundred thirteen thousand, three hundred twelve".