131424431525 has 6 divisors (see below), whose sum is σ = 162966295122. Its totient is φ = 105139545200.

The previous prime is 131424431513. The next prime is 131424431549. The reversal of 131424431525 is 525134424131.

It can be written as a sum of positive squares in 3 ways, for example, as 8323095361 + 123101336164 = 91231^2 + 350858^2 .

It is not a de Polignac number, because 131424431525 - 2⁸ = 131424431269 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2628488606 + ... + 2628488655.

It is an arithmetic number, because the mean of its divisors is an integer number (27161049187).

Almost surely, 2^131424431525 is an apocalyptic number.

It is an amenable number.

131424431525 is a deficient number, since it is larger than the sum of its proper divisors (31541863597).

131424431525 is an equidigital number, since it uses as much as digits as its factorization.

131424431525 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5256977271 (or 5256977266 counting only the distinct ones).

The product of its digits is 57600, while the sum is 35.

Adding to 131424431525 its reverse (525134424131), we get a palindrome (656558855656).

The spelling of 131424431525 in words is "one hundred thirty-one billion, four hundred twenty-four million, four hundred thirty-one thousand, five hundred twenty-five".