131531131655432 has 128 divisors (see below), whose sum is σ = 275656503594240. Its totient is φ = 58517957836800.

The previous prime is 131531131655401. The next prime is 131531131655437. The reversal of 131531131655432 is 234556131135131.

131531131655432 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (131531131655437) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 181929683 + ... + 182651229.

It is an arithmetic number, because the mean of its divisors is an integer number (2153566434330).

Almost surely, 2^{131531131655432} is an apocalyptic number.

It is an amenable number.

131531131655432 is an abundant number, since it is smaller than the sum of its proper divisors (144125371938808).

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

131531131655432 is a wasteful number, since it uses less digits than its factorization.

131531131655432 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 722271 (or 722267 counting only the distinct ones).

The product of its digits is 486000, while the sum is 44.

The spelling of 131531131655432 in words is "one hundred thirty-one trillion, five hundred thirty-one billion, one hundred thirty-one million, six hundred fifty-five thousand, four hundred thirty-two".