231244303213 has 16 divisors (see below), whose sum is σ = 292253970816. Its totient is φ = 177722000640.

The previous prime is 231244303201. The next prime is 231244303247. The reversal of 231244303213 is 312303442132.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 231244303213 - 2²⁹ = 230707432301 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 (231244303313) 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, 20564056 + ... + 20575297.

It is an arithmetic number, because the mean of its divisors is an integer number (18265873176).

Almost surely, 2^231244303213 is an apocalyptic number.

It is an amenable number.

231244303213 is a deficient number, since it is larger than the sum of its proper divisors (61009667603).

231244303213 is a wasteful number, since it uses less digits than its factorization.

231244303213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41139444.

The product of its (nonzero) digits is 10368, while the sum is 28.

Adding to 231244303213 its reverse (312303442132), we get a palindrome (543547745345).

The spelling of 231244303213 in words is "two hundred thirty-one billion, two hundred forty-four million, three hundred three thousand, two hundred thirteen".