2131328 has 16 divisors (see below), whose sum is σ = 4246260. Its totient is φ = 1065600.

The previous prime is 2131321. The next prime is 2131361. The reversal of 2131328 is 8231312.

It is a tau number, because it is divible by the number of its divisors (16).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2131321) 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 as a sum of consecutive naturals, namely, 8198 + ... + 8453.

2^2131328 is an apocalyptic number.

It is an amenable number.

2131328 is a deficient number, since it is larger than the sum of its proper divisors (2114932).

2131328 is an equidigital number, since it uses as much as digits as its factorization.

2131328 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16665 (or 16653 counting only the distinct ones).

The product of its digits is 288, while the sum is 20.

The square root of 2131328 is about 1459.9068463433. The cubic root of 2131328 is about 128.6915693012.

The spelling of 2131328 in words is "two million, one hundred thirty-one thousand, three hundred twenty-eight".