231333233213 has 4 divisors (see below), whose sum is σ = 243508666560. Its totient is φ = 219157799868.

The previous prime is 231333233207. The next prime is 231333233227. The reversal of 231333233213 is 312332333132.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 231333233213 - 2²⁸ = 231064797757 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (231333233113) 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, 6087716645 + ... + 6087716682.

It is an arithmetic number, because the mean of its divisors is an integer number (60877166640).

Almost surely, 2^231333233213 is an apocalyptic number.

It is an amenable number.

231333233213 is a deficient number, since it is larger than the sum of its proper divisors (12175433347).

231333233213 is a wasteful number, since it uses less digits than its factorization.

231333233213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12175433346.

The product of its digits is 17496, while the sum is 29.

Adding to 231333233213 its reverse (312332333132), we get a palindrome (543665566345).

The spelling of 231333233213 in words is "two hundred thirty-one billion, three hundred thirty-three million, two hundred thirty-three thousand, two hundred thirteen".