31132023312331 has 2 divisors, whose sum is σ = 31132023312332. Its totient is φ = 31132023312330.

The previous prime is 31132023312319. The next prime is 31132023312349. The reversal of 31132023312331 is 13321332023113.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 31132023312331 - 2⁹ = 31132023311819 is a prime.

It is a super-2 number, since 2×31132023312331² (a number of 28 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 31132023312331.

It is not a weakly prime, because it can be changed into another prime (31132023312301) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15566011656165 + 15566011656166.

It is an arithmetic number, because the mean of its divisors is an integer number (15566011656166).

Almost surely, 2^{31132023312331} is an apocalyptic number.

31132023312331 is a deficient number, since it is larger than the sum of its proper divisors (1).

31132023312331 is an equidigital number, since it uses as much as digits as its factorization.

31132023312331 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5832, while the sum is 28.

Adding to 31132023312331 its reverse (13321332023113), we get a palindrome (44453355335444).

The spelling of 31132023312331 in words is "thirty-one trillion, one hundred thirty-two billion, twenty-three million, three hundred twelve thousand, three hundred thirty-one".