231311130331 has 2 divisors, whose sum is σ = 231311130332. Its totient is φ = 231311130330.

The previous prime is 231311130313. The next prime is 231311130353. The reversal of 231311130331 is 133031113132.

Together with previous prime (231311130313) it forms an Ormiston pair, because they use the same digits, order apart.

It is an a-pointer prime, because the next prime (231311130353) can be obtained adding 231311130331 to its sum of digits (22).

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 231311130331 - 2⁵ = 231311130299 is a prime.

It is a super-2 number, since 2×231311130331² (a number of 24 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (231311130431) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 115655565165 + 115655565166.

It is an arithmetic number, because the mean of its divisors is an integer number (115655565166).

Almost surely, 2^231311130331 is an apocalyptic number.

231311130331 is a deficient number, since it is larger than the sum of its proper divisors (1).

231311130331 is an equidigital number, since it uses as much as digits as its factorization.

231311130331 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 486, while the sum is 22.

Adding to 231311130331 its reverse (133031113132), we get a palindrome (364342243463).

The spelling of 231311130331 in words is "two hundred thirty-one billion, three hundred eleven million, one hundred thirty thousand, three hundred thirty-one".