31313103163 has 2 divisors, whose sum is σ = 31313103164. Its totient is φ = 31313103162.

The previous prime is 31313103137. The next prime is 31313103167. The reversal of 31313103163 is 36130131313.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-31313103163 is a prime.

It is not a weakly prime, because it can be changed into another prime (31313103167) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15656551581 + 15656551582.

It is an arithmetic number, because the mean of its divisors is an integer number (15656551582).

Almost surely, 2^31313103163 is an apocalyptic number.

31313103163 is a deficient number, since it is larger than the sum of its proper divisors (1).

31313103163 is an equidigital number, since it uses as much as digits as its factorization.

31313103163 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1458, while the sum is 25.

Adding to 31313103163 its reverse (36130131313), we get a palindrome (67443234476).

The spelling of 31313103163 in words is "thirty-one billion, three hundred thirteen million, one hundred three thousand, one hundred sixty-three".