1311216304 has 20 divisors (see below), whose sum is σ = 2547024480. Its totient is φ = 653919680.

The previous prime is 1311216301. The next prime is 1311216311. The reversal of 1311216304 is 4036121131.

It is not an unprimeable number, because it can be changed into a prime (1311216301) 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, 99112 + ... + 111559.

It is an arithmetic number, because the mean of its divisors is an integer number (127351224).

Almost surely, 2^1311216304 is an apocalyptic number.

It is an amenable number.

1311216304 is a deficient number, since it is larger than the sum of its proper divisors (1235808176).

1311216304 is a wasteful number, since it uses less digits than its factorization.

1311216304 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 211068 (or 211062 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 22.

The square root of 1311216304 is about 36210.7208434187. The cubic root of 1311216304 is about 1094.5227179839.

Adding to 1311216304 its reverse (4036121131), we get a palindrome (5347337435).

The spelling of 1311216304 in words is "one billion, three hundred eleven million, two hundred sixteen thousand, three hundred four".