2311331231 has 12 divisors (see below), whose sum is σ = 2576346192. Its totient is φ = 2071608000.

The previous prime is 2311331161. The next prime is 2311331257. The reversal of 2311331231 is 1321331132.

2311331231 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 2311331231 - 2¹⁸ = 2311069087 is a prime.

It is a super-2 number, since 2×2311331231² = 10684504118791950722, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2311331531) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 125930 + ... + 143111.

It is an arithmetic number, because the mean of its divisors is an integer number (214695516).

Almost surely, 2^2311331231 is an apocalyptic number.

2311331231 is a deficient number, since it is larger than the sum of its proper divisors (265014961).

2311331231 is a wasteful number, since it uses less digits than its factorization.

2311331231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 269134 (or 269123 counting only the distinct ones).

The product of its digits is 324, while the sum is 20.

The square root of 2311331231 is about 48076.3063369057. The cubic root of 2311331231 is about 1322.1702954651.

Adding to 2311331231 its reverse (1321331132), we get a palindrome (3632662363).

Subtracting from 2311331231 its reverse (1321331132), we obtain a palindrome (990000099).

The spelling of 2311331231 in words is "two billion, three hundred eleven million, three hundred thirty-one thousand, two hundred thirty-one".