231331130431 has 2 divisors, whose sum is σ = 231331130432. Its totient is φ = 231331130430.

The previous prime is 231331130419. The next prime is 231331130491. The reversal of 231331130431 is 134031133132.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 231331130431 - 2⁹ = 231331129919 is a prime.

It is a super-2 number, since 2×231331130431² (a number of 24 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 231331130396 and 231331130405.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (231331130491) 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, 115665565215 + 115665565216.

It is an arithmetic number, because the mean of its divisors is an integer number (115665565216).

Almost surely, 2^231331130431 is an apocalyptic number.

231331130431 is a deficient number, since it is larger than the sum of its proper divisors (1).

231331130431 is an equidigital number, since it uses as much as digits as its factorization.

231331130431 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1944, while the sum is 25.

Adding to 231331130431 its reverse (134031133132), we get a palindrome (365362263563).

The spelling of 231331130431 in words is "two hundred thirty-one billion, three hundred thirty-one million, one hundred thirty thousand, four hundred thirty-one".