2311131311 has 4 divisors (see below), whose sum is σ = 2314346400. Its totient is φ = 2307916224.

The previous prime is 2311131301. The next prime is 2311131331. The reversal of 2311131311 is 1131311132.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2311131311 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2311131311.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2311131301) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1606466 + ... + 1607903.

It is an arithmetic number, because the mean of its divisors is an integer number (578586600).

Almost surely, 2^2311131311 is an apocalyptic number.

2311131311 is a deficient number, since it is larger than the sum of its proper divisors (3215089).

2311131311 is an equidigital number, since it uses as much as digits as its factorization.

2311131311 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3215088.

The product of its digits is 54, while the sum is 17.

The square root of 2311131311 is about 48074.2270972712. The cubic root of 2311131311 is about 1322.1321737248.

Adding to 2311131311 its reverse (1131311132), we get a palindrome (3442442443).

The spelling of 2311131311 in words is "two billion, three hundred eleven million, one hundred thirty-one thousand, three hundred eleven".