1310321503 has 2 divisors, whose sum is σ = 1310321504. Its totient is φ = 1310321502.

The previous prime is 1310321497. The next prime is 1310321513. The reversal of 1310321503 is 3051230131.

It is a weak prime.

It is an emirp because it is prime and its reverse (3051230131) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1310321503 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1310321513) 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, 655160751 + 655160752.

It is an arithmetic number, because the mean of its divisors is an integer number (655160752).

Almost surely, 2^1310321503 is an apocalyptic number.

1310321503 is a deficient number, since it is larger than the sum of its proper divisors (1).

1310321503 is an equidigital number, since it uses as much as digits as its factorization.

1310321503 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 270, while the sum is 19.

The square root of 1310321503 is about 36198.3632641035. The cubic root of 1310321503 is about 1094.2736863819.

Adding to 1310321503 its reverse (3051230131), we get a palindrome (4361551634).

The spelling of 1310321503 in words is "one billion, three hundred ten million, three hundred twenty-one thousand, five hundred three".