2131321032 has 128 divisors (see below), whose sum is σ = 6091200000. Its totient is φ = 690167808.

The previous prime is 2131320977. The next prime is 2131321033. The reversal of 2131321032 is 2301231312.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 2131320996 and 2131321014.

It is not an unprimeable number, because it can be changed into a prime (2131321033) 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, 1511944 + ... + 1513352.

It is an arithmetic number, because the mean of its divisors is an integer number (47587500).

Almost surely, 2^2131321032 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2131321032, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3045600000).

2131321032 is an abundant number, since it is smaller than the sum of its proper divisors (3959878968).

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

2131321032 is a wasteful number, since it uses less digits than its factorization.

2131321032 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1620 (or 1610 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 18.

The square root of 2131321032 is about 46166.2325948306. The cubic root of 2131321032 is about 1286.9142905631.

Adding to 2131321032 its reverse (2301231312), we get a palindrome (4432552344).

The spelling of 2131321032 in words is "two billion, one hundred thirty-one million, three hundred twenty-one thousand, thirty-two".