131511529 has 2 divisors, whose sum is σ = 131511530. Its totient is φ = 131511528.

The previous prime is 131511509. The next prime is 131511557. The reversal of 131511529 is 925115131.

It is an a-pointer prime, because the next prime (131511557) can be obtained adding 131511529 to its sum of digits (28).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 95511529 + 36000000 = 9773^2 + 6000^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-131511529 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 131511497 and 131511506.

It is not a weakly prime, because it can be changed into another prime (131511509) 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, 65755764 + 65755765.

It is an arithmetic number, because the mean of its divisors is an integer number (65755765).

Almost surely, 2^131511529 is an apocalyptic number.

It is an amenable number.

131511529 is a deficient number, since it is larger than the sum of its proper divisors (1).

131511529 is an equidigital number, since it uses as much as digits as its factorization.

131511529 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1350, while the sum is 28.

The square root of 131511529 is about 11467.8476184505. The cubic root of 131511529 is about 508.5355000101.

The spelling of 131511529 in words is "one hundred thirty-one million, five hundred eleven thousand, five hundred twenty-nine".