231323220213 has 32 divisors (see below), whose sum is σ = 328025635200. Its totient is φ = 144587520000.

The previous prime is 231323220211. The next prime is 231323220217. The reversal of 231323220213 is 312022323132.

It is not a de Polignac number, because 231323220213 - 2¹ = 231323220211 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (231323220211) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 15012313 + ... + 15027713.

It is an arithmetic number, because the mean of its divisors is an integer number (10250801100).

Almost surely, 2^231323220213 is an apocalyptic number.

It is an amenable number.

231323220213 is a deficient number, since it is larger than the sum of its proper divisors (96702414987).

231323220213 is a wasteful number, since it uses less digits than its factorization.

231323220213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18133.

The product of its (nonzero) digits is 2592, while the sum is 24.

Adding to 231323220213 its reverse (312022323132), we get a palindrome (543345543345).

The spelling of 231323220213 in words is "two hundred thirty-one billion, three hundred twenty-three million, two hundred twenty thousand, two hundred thirteen".