1311230318 has 16 divisors (see below), whose sum is σ = 2082341520. Its totient is φ = 617515776.

The previous prime is 1311230317. The next prime is 1311230329. The reversal of 1311230318 is 8130321131.

It is a super-2 number, since 2×1311230318² = 3438649893684762248, which contains 22 as substring.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 1311230293 and 1311230302.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1311230317) 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 7 ways as a sum of consecutive naturals, for example, 93155 + ... + 106302.

It is an arithmetic number, because the mean of its divisors is an integer number (130146345).

Almost surely, 2^1311230318 is an apocalyptic number.

1311230318 is a deficient number, since it is larger than the sum of its proper divisors (771111202).

1311230318 is a wasteful number, since it uses less digits than its factorization.

1311230318 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 199651.

The product of its (nonzero) digits is 432, while the sum is 23.

The square root of 1311230318 is about 36210.9143491296. The cubic root of 1311230318 is about 1094.5266173117.

Adding to 1311230318 its reverse (8130321131), we get a palindrome (9441551449).

The spelling of 1311230318 in words is "one billion, three hundred eleven million, two hundred thirty thousand, three hundred eighteen".