231831063326813 has 2 divisors, whose sum is σ = 231831063326814. Its totient is φ = 231831063326812.

The previous prime is 231831063326783. The next prime is 231831063326897. The reversal of 231831063326813 is 318623360138132.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 229068164460004 + 2762898866809 = 15134998^2 + 1662197^2 .

It is a cyclic number.

It is not a de Polignac number, because 231831063326813 - 2⁶ = 231831063326749 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (231831063326713) 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 as a sum of consecutive naturals, namely, 115915531663406 + 115915531663407.

It is an arithmetic number, because the mean of its divisors is an integer number (115915531663407).

Almost surely, 2^{231831063326813} is an apocalyptic number.

It is an amenable number.

231831063326813 is a deficient number, since it is larger than the sum of its proper divisors (1).

231831063326813 is an equidigital number, since it uses as much as digits as its factorization.

231831063326813 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2239488, while the sum is 50.

The spelling of 231831063326813 in words is "two hundred thirty-one trillion, eight hundred thirty-one billion, sixty-three million, three hundred twenty-six thousand, eight hundred thirteen".