131332521 has 8 divisors (see below), whose sum is σ = 175283680. Its totient is φ = 87468192.

The previous prime is 131332459. The next prime is 131332559. The reversal of 131332521 is 125233131.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 131332521 - 2⁶ = 131332457 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (131332571) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 18091 + ... + 24288.

It is an arithmetic number, because the mean of its divisors is an integer number (21910460).

Almost surely, 2^131332521 is an apocalyptic number.

It is an amenable number.

131332521 is a deficient number, since it is larger than the sum of its proper divisors (43951159).

131332521 is a wasteful number, since it uses less digits than its factorization.

131332521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43415.

The product of its digits is 540, while the sum is 21.

The square root of 131332521 is about 11460.0401831756. The cubic root of 131332521 is about 508.3046628161.

Adding to 131332521 its reverse (125233131), we get a palindrome (256565652).

The spelling of 131332521 in words is "one hundred thirty-one million, three hundred thirty-two thousand, five hundred twenty-one".