2321331231 has 4 divisors (see below), whose sum is σ = 3095108312. Its totient is φ = 1547554152.

The previous prime is 2321331217. The next prime is 2321331263. The reversal of 2321331231 is 1321331232.

2321331231 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

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

It is not a de Polignac number, because 2321331231 - 2¹¹ = 2321329183 is a prime.

It is a super-2 number, since 2×2321331231² = 10777157368031950722, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2321331198 and 2321331207.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2321331031) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 386888536 + ... + 386888541.

It is an arithmetic number, because the mean of its divisors is an integer number (773777078).

Almost surely, 2^2321331231 is an apocalyptic number.

2321331231 is a deficient number, since it is larger than the sum of its proper divisors (773777081).

2321331231 is an equidigital number, since it uses as much as digits as its factorization.

2321331231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 773777080.

The product of its digits is 648, while the sum is 21.

The square root of 2321331231 is about 48180.1954230159. The cubic root of 2321331231 is about 1324.0743469096.

Adding to 2321331231 its reverse (1321331232), we get a palindrome (3642662463).

Subtracting from 2321331231 its reverse (1321331232), we obtain a palindrome (999999999).

The spelling of 2321331231 in words is "two billion, three hundred twenty-one million, three hundred thirty-one thousand, two hundred thirty-one".