131523205521 has 16 divisors (see below), whose sum is σ = 181475069760. Its totient is φ = 84628864320.

The previous prime is 131523205493. The next prime is 131523205529. The reversal of 131523205521 is 125502325131.

It is not a de Polignac number, because 131523205521 - 2⁷ = 131523205393 is a prime.

It is not an unprimeable number, because it can be changed into a prime (131523205529) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 15295 + ... + 513108.

It is an arithmetic number, because the mean of its divisors is an integer number (11342191860).

Almost surely, 2^131523205521 is an apocalyptic number.

It is an amenable number.

131523205521 is a deficient number, since it is larger than the sum of its proper divisors (49951864239).

131523205521 is a wasteful number, since it uses less digits than its factorization.

131523205521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 531296.

The product of its (nonzero) digits is 9000, while the sum is 30.

The spelling of 131523205521 in words is "one hundred thirty-one billion, five hundred twenty-three million, two hundred five thousand, five hundred twenty-one".