131402433521521 has 2 divisors, whose sum is σ = 131402433521522. Its totient is φ = 131402433521520.

The previous prime is 131402433521461. The next prime is 131402433521551. The reversal of 131402433521521 is 125125334204131.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 68869749488400 + 62532684033121 = 8298780^2 + 7907761^2 .

It is a cyclic number.

It is not a de Polignac number, because 131402433521521 - 2⁷ = 131402433521393 is a prime.

It is not a weakly prime, because it can be changed into another prime (131402433521551) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 65701216760760 + 65701216760761.

It is an arithmetic number, because the mean of its divisors is an integer number (65701216760761).

Almost surely, 2^{131402433521521} is an apocalyptic number.

It is an amenable number.

131402433521521 is a deficient number, since it is larger than the sum of its proper divisors (1).

131402433521521 is an equidigital number, since it uses as much as digits as its factorization.

131402433521521 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 86400, while the sum is 37.

Adding to 131402433521521 its reverse (125125334204131), we get a palindrome (256527767725652).

The spelling of 131402433521521 in words is "one hundred thirty-one trillion, four hundred two billion, four hundred thirty-three million, five hundred twenty-one thousand, five hundred twenty-one".