2331231231 has 16 divisors (see below), whose sum is σ = 3553031168. Its totient is φ = 1331877600.

The previous prime is 2331231229. The next prime is 2331231247. The reversal of 2331231231 is 1321321332.

It is not a de Polignac number, because 2331231231 - 2¹ = 2331231229 is a prime.

It is a super-2 number, since 2×2331231231² = 10869278104779550722, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2331231198 and 2331231207.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2331231271) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 191301 + ... + 203121.

It is an arithmetic number, because the mean of its divisors is an integer number (222064448).

Almost surely, 2^2331231231 is an apocalyptic number.

2331231231 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

2331231231 is a deficient number, since it is larger than the sum of its proper divisors (1221799937).

2331231231 is a wasteful number, since it uses less digits than its factorization.

2331231231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21222.

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

The square root of 2331231231 is about 48282.8254247823. The cubic root of 2331231231 is about 1325.9539788928.

Adding to 2331231231 its reverse (1321321332), we get a palindrome (3652552563).

The spelling of 2331231231 in words is "two billion, three hundred thirty-one million, two hundred thirty-one thousand, two hundred thirty-one".