131532442521 has 4 divisors (see below), whose sum is σ = 175376590032. Its totient is φ = 87688295012.

The previous prime is 131532442453. The next prime is 131532442541. The reversal of 131532442521 is 125244235131.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 131532442521 - 2³¹ = 129384958873 is a prime.

It is not an unprimeable number, because it can be changed into a prime (131532442541) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 21922073751 + ... + 21922073756.

It is an arithmetic number, because the mean of its divisors is an integer number (43844147508).

Almost surely, 2^131532442521 is an apocalyptic number.

It is an amenable number.

131532442521 is a deficient number, since it is larger than the sum of its proper divisors (43844147511).

131532442521 is an equidigital number, since it uses as much as digits as its factorization.

131532442521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43844147510.

The product of its digits is 28800, while the sum is 33.

Adding to 131532442521 its reverse (125244235131), we get a palindrome (256776677652).

The spelling of 131532442521 in words is "one hundred thirty-one billion, five hundred thirty-two million, four hundred forty-two thousand, five hundred twenty-one".