131324521521 has 8 divisors (see below), whose sum is σ = 175265968864. Its totient is φ = 87466377600.

The previous prime is 131324521511. The next prime is 131324521543. The reversal of 131324521521 is 125125423131.

It is a happy number.

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

It is not a de Polignac number, because 131324521521 - 2²⁵ = 131290967089 is a prime.

It is a super-2 number, since 2×131324521521² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (131324521511) 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, 20822176 + ... + 20828481.

It is an arithmetic number, because the mean of its divisors is an integer number (21908246108).

Almost surely, 2^131324521521 is an apocalyptic number.

It is an amenable number.

131324521521 is a deficient number, since it is larger than the sum of its proper divisors (43941447343).

131324521521 is a wasteful number, since it uses less digits than its factorization.

131324521521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41651711.

The product of its digits is 7200, while the sum is 30.

Adding to 131324521521 its reverse (125125423131), we get a palindrome (256449944652).

The spelling of 131324521521 in words is "one hundred thirty-one billion, three hundred twenty-four million, five hundred twenty-one thousand, five hundred twenty-one".