131324521522 has 4 divisors (see below), whose sum is σ = 196986782286. Its totient is φ = 65662260760.

The previous prime is 131324521511. The next prime is 131324521543. The reversal of 131324521522 is 225125423131.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 96471738801 + 34852782721 = 310599^2 + 186689^2 .

It is a super-2 number, since 2×131324521522² (a number of 23 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32831130379 + ... + 32831130382.

Almost surely, 2^131324521522 is an apocalyptic number.

131324521522 is a deficient number, since it is larger than the sum of its proper divisors (65662260764).

131324521522 is an equidigital number, since it uses as much as digits as its factorization.

131324521522 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 65662260763.

The product of its digits is 14400, while the sum is 31.

Adding to 131324521522 its reverse (225125423131), we get a palindrome (356449944653).

The spelling of 131324521522 in words is "one hundred thirty-one billion, three hundred twenty-four million, five hundred twenty-one thousand, five hundred twenty-two".