2131641 has 12 divisors (see below), whose sum is σ = 3095040. Its totient is φ = 1413720.

The previous prime is 2131627. The next prime is 2131651. The reversal of 2131641 is 1461312.

It is a happy number.

2131641 is a `hidden beast` number, since 21 + 3 + 1 + 641 = 666.

It is not a de Polignac number, because 2131641 - 2⁵ = 2131609 is a prime.

It is an Ulam number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (2131601) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1656 + ... + 2646.

It is an arithmetic number, because the mean of its divisors is an integer number (257920).

2^2131641 is an apocalyptic number.

It is an amenable number.

2131641 is a deficient number, since it is larger than the sum of its proper divisors (963399).

2131641 is a wasteful number, since it uses less digits than its factorization.

2131641 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1236 (or 1233 counting only the distinct ones).

The product of its digits is 144, while the sum is 18.

The square root of 2131641 is about 1460.0140410284. The cubic root of 2131641 is about 128.6978687367.

Adding to 2131641 its reverse (1461312), we get a palindrome (3592953).

It can be divided in two parts, 2131 and 641, that added together give a palindrome (2772).

The spelling of 2131641 in words is "two million, one hundred thirty-one thousand, six hundred forty-one".