131991552020 has 24 divisors (see below), whose sum is σ = 277193599200. Its totient is φ = 52794460832.

The previous prime is 131991552001. The next prime is 131991552023. The reversal of 131991552020 is 20255199131.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131991552023) 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, 422171 + ... + 664989.

It is an arithmetic number, because the mean of its divisors is an integer number (11549733300).

Almost surely, 2^131991552020 is an apocalyptic number.

131991552020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

131991552020 is an abundant number, since it is smaller than the sum of its proper divisors (145202047180).

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

131991552020 is a wasteful number, since it uses less digits than its factorization.

131991552020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 270007 (or 270005 counting only the distinct ones).

The product of its (nonzero) digits is 24300, while the sum is 38.

The spelling of 131991552020 in words is "one hundred thirty-one billion, nine hundred ninety-one million, five hundred fifty-two thousand, twenty".