231230131031 has 2 divisors, whose sum is σ = 231230131032. Its totient is φ = 231230131030.

The previous prime is 231230130947. The next prime is 231230131073. The reversal of 231230131031 is 130131032132.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 231230131031 - 2¹⁰ = 231230130007 is a prime.

It is a super-3 number, since 3×231230131031³ (a number of 35 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a junction number, because it is equal to n+sod(n) for n = 231230130994 and 231230131012.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (231230131631) 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, 115615065515 + 115615065516.

It is an arithmetic number, because the mean of its divisors is an integer number (115615065516).

Almost surely, 2^231230131031 is an apocalyptic number.

231230131031 is a deficient number, since it is larger than the sum of its proper divisors (1).

231230131031 is an equidigital number, since it uses as much as digits as its factorization.

231230131031 is an odious number, because the sum of its binary digits is odd.

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

Adding to 231230131031 its reverse (130131032132), we get a palindrome (361361163163).

The spelling of 231230131031 in words is "two hundred thirty-one billion, two hundred thirty million, one hundred thirty-one thousand, thirty-one".