4000031311 has 2 divisors, whose sum is σ = 4000031312. Its totient is φ = 4000031310.

The previous prime is 4000031309. The next prime is 4000031323. The reversal of 4000031311 is 1131300004.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 4000031311 - 2¹ = 4000031309 is a prime.

Together with 4000031309, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 4000031291 and 4000031300.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (4000031341) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2000015655 + 2000015656.

It is an arithmetic number, because the mean of its divisors is an integer number (2000015656).

Almost surely, 2^4000031311 is an apocalyptic number.

4000031311 is a deficient number, since it is larger than the sum of its proper divisors (1).

4000031311 is an equidigital number, since it uses as much as digits as its factorization.

4000031311 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 36, while the sum is 13.

The square root of 4000031311 is about 63245.8007380727. The cubic root of 4000031311 is about 1587.4051938836.

Adding to 4000031311 its reverse (1131300004), we get a palindrome (5131331315).

The spelling of 4000031311 in words is "four billion, thirty-one thousand, three hundred eleven".