131530525 has 24 divisors (see below), whose sum is σ = 186845184. Its totient is φ = 89976000.

The previous prime is 131530493. The next prime is 131530561. The reversal of 131530525 is 525035131.

It is not a de Polignac number, because 131530525 - 2⁵ = 131530493 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (25).

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 131530525.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 113700 + ... + 114850.

It is an arithmetic number, because the mean of its divisors is an integer number (7785216).

Almost surely, 2^131530525 is an apocalyptic number.

It is an amenable number.

131530525 is a deficient number, since it is larger than the sum of its proper divisors (55314659).

131530525 is a wasteful number, since it uses less digits than its factorization.

131530525 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1821 (or 1816 counting only the distinct ones).

The product of its (nonzero) digits is 2250, while the sum is 25.

The square root of 131530525 is about 11468.6758171988. The cubic root of 131530525 is about 508.5599837324.

Adding to 131530525 its reverse (525035131), we get a palindrome (656565656).

The spelling of 131530525 in words is "one hundred thirty-one million, five hundred thirty thousand, five hundred twenty-five".