2131921484 has 48 divisors (see below), whose sum is σ = 4699484160. Its totient is φ = 822044160.

The previous prime is 2131921481. The next prime is 2131921489. The reversal of 2131921484 is 4841291312.

It is not an unprimeable number, because it can be changed into a prime (2131921481) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5804 + ... + 65555.

It is an arithmetic number, because the mean of its divisors is an integer number (97905920).

Almost surely, 2^2131921484 is an apocalyptic number.

It is an amenable number.

2131921484 is an abundant number, since it is smaller than the sum of its proper divisors (2567562676).

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

2131921484 is a wasteful number, since it uses less digits than its factorization.

2131921484 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 71478 (or 71476 counting only the distinct ones).

The product of its digits is 13824, while the sum is 35.

The square root of 2131921484 is about 46172.7352882629. The cubic root of 2131921484 is about 1287.0351323154.

The spelling of 2131921484 in words is "two billion, one hundred thirty-one million, nine hundred twenty-one thousand, four hundred eighty-four".