131505023404520 has 32 divisors (see below), whose sum is σ = 308750924517120. Its totient is φ = 50314965476160.

The previous prime is 131505023404499. The next prime is 131505023404603. The reversal of 131505023404520 is 25404320505131.

131505023404520 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 71470120496 + ... + 71470122335.

It is an arithmetic number, because the mean of its divisors is an integer number (9648466391160).

Almost surely, 2^{131505023404520} is an apocalyptic number.

131505023404520 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

131505023404520 is an abundant number, since it is smaller than the sum of its proper divisors (177245901112600).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

131505023404520 is a wasteful number, since it uses less digits than its factorization.

131505023404520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 142940242865 (or 142940242861 counting only the distinct ones).

The product of its (nonzero) digits is 72000, while the sum is 35.

Adding to 131505023404520 its reverse (25404320505131), we get a palindrome (156909343909651).

The spelling of 131505023404520 in words is "one hundred thirty-one trillion, five hundred five billion, twenty-three million, four hundred four thousand, five hundred twenty".