31310312641 has 2 divisors, whose sum is σ = 31310312642. Its totient is φ = 31310312640.

The previous prime is 31310312599. The next prime is 31310312681. The reversal of 31310312641 is 14621301313.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 22051062016 + 9259250625 = 148496^2 + 96225^2 .

It is a cyclic number.

It is not a de Polignac number, because 31310312641 - 2¹³ = 31310304449 is a prime.

It is not a weakly prime, because it can be changed into another prime (31310312681) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15655156320 + 15655156321.

It is an arithmetic number, because the mean of its divisors is an integer number (15655156321).

Almost surely, 2^31310312641 is an apocalyptic number.

It is an amenable number.

31310312641 is a deficient number, since it is larger than the sum of its proper divisors (1).

31310312641 is an equidigital number, since it uses as much as digits as its factorization.

31310312641 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1296, while the sum is 25.

Adding to 31310312641 its reverse (14621301313), we get a palindrome (45931613954).

The spelling of 31310312641 in words is "thirty-one billion, three hundred ten million, three hundred twelve thousand, six hundred forty-one".