2213813 has 4 divisors (see below), whose sum is σ = 2530080. Its totient is φ = 1897548.

The previous prime is 2213789. The next prime is 2213833. The reversal of 2213813 is 3183122.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 2213813 - 2¹² = 2209717 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2213833) 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, 158123 + ... + 158136.

It is an arithmetic number, because the mean of its divisors is an integer number (632520).

2^2213813 is an apocalyptic number.

It is an amenable number.

2213813 is a deficient number, since it is larger than the sum of its proper divisors (316267).

2213813 is an equidigital number, since it uses as much as digits as its factorization.

2213813 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 316266.

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

The square root of 2213813 is about 1487.8887727246. Note that the first 3 decimals coincide. The cubic root of 2213813 is about 130.3307750116.

Adding to 2213813 its reverse (3183122), we get a palindrome (5396935).

The spelling of 2213813 in words is "two million, two hundred thirteen thousand, eight hundred thirteen".