2331212231 has 4 divisors (see below), whose sum is σ = 2332785672. Its totient is φ = 2329638792.

The previous prime is 2331212207. The next prime is 2331212237. The reversal of 2331212231 is 1322121332.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2331212231 is a prime.

It is a super-2 number, since 2×2331212231² = 10869100931927994722, 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 (2331212237) 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 in 3 ways as a sum of consecutive naturals, for example, 784496 + ... + 787461.

It is an arithmetic number, because the mean of its divisors is an integer number (583196418).

Almost surely, 2^2331212231 is an apocalyptic number.

2331212231 is a deficient number, since it is larger than the sum of its proper divisors (1573441).

2331212231 is a wasteful number, since it uses less digits than its factorization.

2331212231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1573440.

The product of its digits is 432, while the sum is 20.

The square root of 2331212231 is about 48282.6286670475. The cubic root of 2331212231 is about 1325.9503766197.

Adding to 2331212231 its reverse (1322121332), we get a palindrome (3653333563).

The spelling of 2331212231 in words is "two billion, three hundred thirty-one million, two hundred twelve thousand, two hundred thirty-one".