31313343541 has 2 divisors, whose sum is σ = 31313343542. Its totient is φ = 31313343540.

The previous prime is 31313343539. The next prime is 31313343553. The reversal of 31313343541 is 14534331313.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 25638734641 + 5674608900 = 160121^2 + 75330^2 .

It is a cyclic number.

It is not a de Polignac number, because 31313343541 - 2¹ = 31313343539 is a prime.

Together with 31313343539, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31313341541) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15656671770 + 15656671771.

It is an arithmetic number, because the mean of its divisors is an integer number (15656671771).

Almost surely, 2^31313343541 is an apocalyptic number.

It is an amenable number.

31313343541 is a deficient number, since it is larger than the sum of its proper divisors (1).

31313343541 is an equidigital number, since it uses as much as digits as its factorization.

31313343541 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 19440, while the sum is 31.

Adding to 31313343541 its reverse (14534331313), we get a palindrome (45847674854).

The spelling of 31313343541 in words is "thirty-one billion, three hundred thirteen million, three hundred forty-three thousand, five hundred forty-one".