231323210013 has 64 divisors (see below), whose sum is σ = 372866457600. Its totient is φ = 127407905856.

The previous prime is 231323210011. The next prime is 231323210059. The reversal of 231323210013 is 310012323132.

It is not a de Polignac number, because 231323210013 - 2¹ = 231323210011 is a prime.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (231323210011) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 4045420 + ... + 4102202.

It is an arithmetic number, because the mean of its divisors is an integer number (5826038400).

Almost surely, 2^231323210013 is an apocalyptic number.

It is an amenable number.

231323210013 is a deficient number, since it is larger than the sum of its proper divisors (141543247587).

231323210013 is a wasteful number, since it uses less digits than its factorization.

231323210013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56951 (or 56937 counting only the distinct ones).

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

Adding to 231323210013 its reverse (310012323132), we get a palindrome (541335533145).

The spelling of 231323210013 in words is "two hundred thirty-one billion, three hundred twenty-three million, two hundred ten thousand, thirteen".