1311313216 has 14 divisors (see below), whose sum is σ = 2602137290. Its totient is φ = 655656576.

The previous prime is 1311313183. The next prime is 1311313229. The reversal of 1311313216 is 6123131131.

It can be written as a sum of positive squares in only one way, i.e., 1278777600 + 32535616 = 35760^2 + 5704^2 .

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10244571 + ... + 10244698.

Almost surely, 2^1311313216 is an apocalyptic number.

1311313216 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

1311313216 is a deficient number, since it is larger than the sum of its proper divisors (1290824074).

1311313216 is an equidigital number, since it uses as much as digits as its factorization.

1311313216 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20489281 (or 20489271 counting only the distinct ones).

The product of its digits is 324, while the sum is 22.

The square root of 1311313216 is about 36212.0589859235. The cubic root of 1311313216 is about 1094.5496827118.

Adding to 1311313216 its reverse (6123131131), we get a palindrome (7434444347).

The spelling of 1311313216 in words is "one billion, three hundred eleven million, three hundred thirteen thousand, two hundred sixteen".