131301315661 has 2 divisors, whose sum is σ = 131301315662. Its totient is φ = 131301315660.

The previous prime is 131301315503. The next prime is 131301315683. The reversal of 131301315661 is 166513103131.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 113910300036 + 17391015625 = 337506^2 + 131875^2 .

It is a cyclic number.

It is not a de Polignac number, because 131301315661 - 2⁹ = 131301315149 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (131301315161) 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, 65650657830 + 65650657831.

It is an arithmetic number, because the mean of its divisors is an integer number (65650657831).

Almost surely, 2^131301315661 is an apocalyptic number.

It is an amenable number.

131301315661 is a deficient number, since it is larger than the sum of its proper divisors (1).

131301315661 is an equidigital number, since it uses as much as digits as its factorization.

131301315661 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4860, while the sum is 31.

Adding to 131301315661 its reverse (166513103131), we get a palindrome (297814418792).

The spelling of 131301315661 in words is "one hundred thirty-one billion, three hundred one million, three hundred fifteen thousand, six hundred sixty-one".