2213641 has 4 divisors (see below), whose sum is σ = 2218500. Its totient is φ = 2208784.

The previous prime is 2213623. The next prime is 2213647. The reversal of 2213641 is 1463122.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 783225 + 1430416 = 885^2 + 1196^2 .

It is a cyclic number.

It is not a de Polignac number, because 2213641 - 2⁵ = 2213609 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2213647) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1666 + ... + 2683.

It is an arithmetic number, because the mean of its divisors is an integer number (554625).

2^2213641 is an apocalyptic number.

It is an amenable number.

2213641 is a deficient number, since it is larger than the sum of its proper divisors (4859).

2213641 is an equidigital number, since it uses as much as digits as its factorization.

2213641 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4858.

The product of its digits is 288, while the sum is 19.

The square root of 2213641 is about 1487.8309715825. The cubic root of 2213641 is about 130.3273996175.

Adding to 2213641 its reverse (1463122), we get a palindrome (3676763).

The spelling of 2213641 in words is "two million, two hundred thirteen thousand, six hundred forty-one".