131720525 has 12 divisors (see below), whose sum is σ = 164072832. Its totient is φ = 104899440.

The previous prime is 131720513. The next prime is 131720527. The reversal of 131720525 is 525027131.

It is not a de Polignac number, because 131720525 - 2⁸ = 131720269 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 131720494 and 131720503.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131720527) 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 in 11 ways as a sum of consecutive naturals, for example, 6239 + ... + 17388.

It is an arithmetic number, because the mean of its divisors is an integer number (13672736).

Almost surely, 2^131720525 is an apocalyptic number.

It is an amenable number.

131720525 is a deficient number, since it is larger than the sum of its proper divisors (32352307).

131720525 is a wasteful number, since it uses less digits than its factorization.

131720525 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23860 (or 23855 counting only the distinct ones).

The product of its (nonzero) digits is 2100, while the sum is 26.

The square root of 131720525 is about 11476.9562602634. The cubic root of 131720525 is about 508.8047429055.

Adding to 131720525 its reverse (525027131), we get a palindrome (656747656).

The spelling of 131720525 in words is "one hundred thirty-one million, seven hundred twenty thousand, five hundred twenty-five".