131524817 has 2 divisors, whose sum is σ = 131524818. Its totient is φ = 131524816.

The previous prime is 131524781. The next prime is 131524829. The reversal of 131524817 is 718425131.

Together with previous prime (131524781) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 91087936 + 40436881 = 9544^2 + 6359^2 .

It is a cyclic number.

It is not a de Polignac number, because 131524817 - 2¹⁶ = 131459281 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (131524837) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 65762408 + 65762409.

It is an arithmetic number, because the mean of its divisors is an integer number (65762409).

Almost surely, 2^131524817 is an apocalyptic number.

It is an amenable number.

131524817 is a deficient number, since it is larger than the sum of its proper divisors (1).

131524817 is an equidigital number, since it uses as much as digits as its factorization.

131524817 is an evil number, because the sum of its binary digits is even.

The product of its digits is 6720, while the sum is 32.

The square root of 131524817 is about 11468.4269627530. The cubic root of 131524817 is about 508.5526270057.

Adding to 131524817 its reverse (718425131), we get a palindrome (849949948).

The spelling of 131524817 in words is "one hundred thirty-one million, five hundred twenty-four thousand, eight hundred seventeen".