2213643 has 6 divisors (see below), whose sum is σ = 2954964. Its totient is φ = 1474044.

The previous prime is 2213623. The next prime is 2213647. The reversal of 2213643 is 3463122.

Added to its reverse (3463122) it gives a triangular number (5676765 = T₃₃₆₉).

It is a happy number.

It is not a de Polignac number, because 2213643 - 2¹² = 2209547 is a prime.

It is a d-powerful number, because it can be written as 2⁷ + 2²¹ + 1 + 3⁸ + 6⁶ + 4⁶ + 3¹⁰ .

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 5 ways as a sum of consecutive naturals, for example, 2148 + ... + 3006.

It is an arithmetic number, because the mean of its divisors is an integer number (492494).

2^2213643 is an apocalyptic number.

2213643 is a deficient number, since it is larger than the sum of its proper divisors (741321).

2213643 is an frugal number, since it uses more digits than its factorization.

2213643 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1721 (or 862 counting only the distinct ones).

The product of its digits is 864, while the sum is 21.

The square root of 2213643 is about 1487.8316437017. The cubic root of 2213643 is about 130.3274388673.

Adding to 2213643 its reverse (3463122), we get a palindrome (5676765).

The spelling of 2213643 in words is "two million, two hundred thirteen thousand, six hundred forty-three".