313111110503 has 2 divisors, whose sum is σ = 313111110504. Its totient is φ = 313111110502.

The previous prime is 313111110491. The next prime is 313111110551. The reversal of 313111110503 is 305011111313.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 313111110503 - 2¹⁴ = 313111094119 is a prime.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (313111110593) 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, 156555555251 + 156555555252.

It is an arithmetic number, because the mean of its divisors is an integer number (156555555252).

Almost surely, 2^313111110503 is an apocalyptic number.

313111110503 is a deficient number, since it is larger than the sum of its proper divisors (1).

313111110503 is an equidigital number, since it uses as much as digits as its factorization.

313111110503 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 135, while the sum is 20.

Adding to 313111110503 its reverse (305011111313), we get a palindrome (618122221816).

The spelling of 313111110503 in words is "three hundred thirteen billion, one hundred eleven million, one hundred ten thousand, five hundred three".