131500549 has 2 divisors, whose sum is σ = 131500550. Its totient is φ = 131500548.

The previous prime is 131500547. The next prime is 131500601. The reversal of 131500549 is 945005131.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 116251524 + 15249025 = 10782^2 + 3905^2 .

It is a cyclic number.

It is not a de Polignac number, because 131500549 - 2¹ = 131500547 is a prime.

Together with 131500547, 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 (131500547) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 65750274 + 65750275.

It is an arithmetic number, because the mean of its divisors is an integer number (65750275).

Almost surely, 2^131500549 is an apocalyptic number.

It is an amenable number.

131500549 is a deficient number, since it is larger than the sum of its proper divisors (1).

131500549 is an equidigital number, since it uses as much as digits as its factorization.

131500549 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2700, while the sum is 28.

The square root of 131500549 is about 11467.3688786923. The cubic root of 131500549 is about 508.5213469412.

The spelling of 131500549 in words is "one hundred thirty-one million, five hundred thousand, five hundred forty-nine".