131111503 has 2 divisors, whose sum is σ = 131111504. Its totient is φ = 131111502.

The previous prime is 131111501. The next prime is 131111537. The reversal of 131111503 is 305111131.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 131111503 - 2¹ = 131111501 is a prime.

Together with 131111501, 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 (131111501) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 65555751 + 65555752.

It is an arithmetic number, because the mean of its divisors is an integer number (65555752).

Almost surely, 2^131111503 is an apocalyptic number.

131111503 is a deficient number, since it is larger than the sum of its proper divisors (1).

131111503 is an equidigital number, since it uses as much as digits as its factorization.

131111503 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 45, while the sum is 16.

The square root of 131111503 is about 11450.3931373556. The cubic root of 131111503 is about 508.0193626757.

Adding to 131111503 its reverse (305111131), we get a palindrome (436222634).

The spelling of 131111503 in words is "one hundred thirty-one million, one hundred eleven thousand, five hundred three".