1311302311 has 16 divisors (see below), whose sum is σ = 1470868128. Its totient is φ = 1158537600.

The previous prime is 1311302297. The next prime is 1311302323. The reversal of 1311302311 is 1132031131.

It is not a de Polignac number, because 1311302311 - 2²¹ = 1309205159 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 (1311302351) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 560901 + ... + 563233.

It is an arithmetic number, because the mean of its divisors is an integer number (91929258).

Almost surely, 2^1311302311 is an apocalyptic number.

1311302311 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

1311302311 is a deficient number, since it is larger than the sum of its proper divisors (159565817).

1311302311 is a wasteful number, since it uses less digits than its factorization.

1311302311 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3762.

The product of its (nonzero) digits is 54, while the sum is 16.

The square root of 1311302311 is about 36211.9084142220. The cubic root of 1311302311 is about 1094.5466485784.

Adding to 1311302311 its reverse (1132031131), we get a palindrome (2443333442).

The spelling of 1311302311 in words is "one billion, three hundred eleven million, three hundred two thousand, three hundred eleven".