131321503 has 2 divisors, whose sum is σ = 131321504. Its totient is φ = 131321502.

The previous prime is 131321497. The next prime is 131321507. The reversal of 131321503 is 305123131.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-131321503 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (131321507) 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, 65660751 + 65660752.

It is an arithmetic number, because the mean of its divisors is an integer number (65660752).

Almost surely, 2^131321503 is an apocalyptic number.

131321503 is a deficient number, since it is larger than the sum of its proper divisors (1).

131321503 is an equidigital number, since it uses as much as digits as its factorization.

131321503 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 131321503 is about 11459.5594592462. The cubic root of 131321503 is about 508.2904478617.

Adding to 131321503 its reverse (305123131), we get a palindrome (436444634).

The spelling of 131321503 in words is "one hundred thirty-one million, three hundred twenty-one thousand, five hundred three".