2131431132 has 12 divisors (see below), whose sum is σ = 4973339336. Its totient is φ = 710477040.

The previous prime is 2131431097. The next prime is 2131431157. The reversal of 2131431132 is 2311341312.

It is a tau number, because it is divible by the number of its divisors (12).

It is a nude number because it is divisible by every one of its digits.

It is a junction number, because it is equal to n+sod(n) for n = 2131431099 and 2131431108.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 88809619 + ... + 88809642.

Almost surely, 2^2131431132 is an apocalyptic number.

It is an amenable number.

2131431132 is an abundant number, since it is smaller than the sum of its proper divisors (2841908204).

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

2131431132 is a wasteful number, since it uses less digits than its factorization.

2131431132 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 177619268 (or 177619266 counting only the distinct ones).

The product of its digits is 432, while the sum is 21.

The square root of 2131431132 is about 46167.4250094155. The cubic root of 2131431132 is about 1286.9364500316.

Adding to 2131431132 its reverse (2311341312), we get a palindrome (4442772444).

The spelling of 2131431132 in words is "two billion, one hundred thirty-one million, four hundred thirty-one thousand, one hundred thirty-two".