1312143311 has 4 divisors (see below), whose sum is σ = 1328752800. Its totient is φ = 1295533824.

The previous prime is 1312143271. The next prime is 1312143331. The reversal of 1312143311 is 1133412131.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1312143311 - 2¹⁴ = 1312126927 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1312143331) 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, 8304626 + ... + 8304783.

It is an arithmetic number, because the mean of its divisors is an integer number (332188200).

Almost surely, 2^1312143311 is an apocalyptic number.

1312143311 is a deficient number, since it is larger than the sum of its proper divisors (16609489).

1312143311 is an equidigital number, since it uses as much as digits as its factorization.

1312143311 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16609488.

The product of its digits is 216, while the sum is 20.

The square root of 1312143311 is about 36223.5187550851. The cubic root of 1312143311 is about 1094.7805933635.

Adding to 1312143311 its reverse (1133412131), we get a palindrome (2445555442).

The spelling of 1312143311 in words is "one billion, three hundred twelve million, one hundred forty-three thousand, three hundred eleven".