231030131213 has 6 divisors (see below), whose sum is σ = 268749336366. Its totient is φ = 198025826712.

The previous prime is 231030131203. The next prime is 231030131243. The reversal of 231030131213 is 312131030132.

It can be written as a sum of positive squares in only one way, i.e., 124413514729 + 106616616484 = 352723^2 + 326522^2 .

It is not a de Polignac number, because 231030131213 - 2⁶ = 231030131149 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (231030131203) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2357450270 + ... + 2357450367.

It is an arithmetic number, because the mean of its divisors is an integer number (44791556061).

Almost surely, 2^231030131213 is an apocalyptic number.

It is an amenable number.

231030131213 is a deficient number, since it is larger than the sum of its proper divisors (37719205153).

231030131213 is an equidigital number, since it uses as much as digits as its factorization.

231030131213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4714900651 (or 4714900644 counting only the distinct ones).

The product of its (nonzero) digits is 324, while the sum is 20.

Adding to 231030131213 its reverse (312131030132), we get a palindrome (543161161345).

The spelling of 231030131213 in words is "two hundred thirty-one billion, thirty million, one hundred thirty-one thousand, two hundred thirteen".