2131988 has 12 divisors (see below), whose sum is σ = 3784032. Its totient is φ = 1050840.

The previous prime is 2131981. The next prime is 2131991. The reversal of 2131988 is 8891312.

It is a d-powerful number, because it can be written as 2¹¹ + 1 + 3² + 1 + 9 + 8⁵ + 8⁷ .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2131981) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (5) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3470 + ... + 4037.

It is an arithmetic number, because the mean of its divisors is an integer number (315336).

2^2131988 is an apocalyptic number.

It is an amenable number.

2131988 is a deficient number, since it is larger than the sum of its proper divisors (1652044).

2131988 is a wasteful number, since it uses less digits than its factorization.

2131988 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7582 (or 7580 counting only the distinct ones).

The product of its digits is 3456, while the sum is 32.

The square root of 2131988 is about 1460.1328706662. The cubic root of 2131988 is about 128.7048517352.

The spelling of 2131988 in words is "two million, one hundred thirty-one thousand, nine hundred eighty-eight".