2031320311 has 2 divisors, whose sum is σ = 2031320312. Its totient is φ = 2031320310.

The previous prime is 2031320309. The next prime is 2031320351. The reversal of 2031320311 is 1130231302.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2031320311 - 2¹ = 2031320309 is a prime.

It is a super-2 number, since 2×2031320311² = 8252524411762273442, which contains 22 as substring.

Together with 2031320309, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2031320351) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1015660155 + 1015660156.

It is an arithmetic number, because the mean of its divisors is an integer number (1015660156).

Almost surely, 2^2031320311 is an apocalyptic number.

2031320311 is a deficient number, since it is larger than the sum of its proper divisors (1).

2031320311 is an equidigital number, since it uses as much as digits as its factorization.

2031320311 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 108, while the sum is 16.

The square root of 2031320311 is about 45070.1709670598. The cubic root of 2031320311 is about 1266.4638671709.

Adding to 2031320311 its reverse (1130231302), we get a palindrome (3161551613).

The spelling of 2031320311 in words is "two billion, thirty-one million, three hundred twenty thousand, three hundred eleven".