131503481 has 2 divisors, whose sum is σ = 131503482. Its totient is φ = 131503480.

The previous prime is 131503469. The next prime is 131503553. The reversal of 131503481 is 184305131.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 127893481 + 3610000 = 11309^2 + 1900^2 .

It is a cyclic number.

It is not a de Polignac number, because 131503481 - 2¹⁸ = 131241337 is a prime.

It is a super-2 number, since 2×131503481² = 34586331030234722, which contains 22 as substring.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 131503481.

It is not a weakly prime, because it can be changed into another prime (131503181) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 65751740 + 65751741.

It is an arithmetic number, because the mean of its divisors is an integer number (65751741).

Almost surely, 2^131503481 is an apocalyptic number.

It is an amenable number.

131503481 is a deficient number, since it is larger than the sum of its proper divisors (1).

131503481 is an equidigital number, since it uses as much as digits as its factorization.

131503481 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1440, while the sum is 26.

The square root of 131503481 is about 11467.4967189880. The cubic root of 131503481 is about 508.5251263259.

The spelling of 131503481 in words is "one hundred thirty-one million, five hundred three thousand, four hundred eighty-one".