22213 has 4 divisors (see below), whose sum is σ = 22540. Its totient is φ = 21888.

The previous prime is 22193. The next prime is 22229. The reversal of 22213 is 31222.

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 16129 + 6084 = 127^2 + 78^2 .

It is a cyclic number.

It is not a de Polignac number, because 22213 - 2⁹ = 21701 is a prime.

It is a Duffinian number.

It is a plaindrome in base 15.

It is a self number, because there is not a number n which added to its sum of digits gives 22213.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22273) 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, 18 + ... + 211.

It is an arithmetic number, because the mean of its divisors is an integer number (5635).

2²²²¹³ is an apocalyptic number.

It is an amenable number.

22213 is a deficient number, since it is larger than the sum of its proper divisors (327).

22213 is an equidigital number, since it uses as much as digits as its factorization.

22213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 326.

The product of its digits is 24, while the sum is 10.

The square root of 22213 is about 149.0402630164. The cubic root of 22213 is about 28.1105324769.

Adding to 22213 its reverse (31222), we get a palindrome (53435).

Subtracting 22213 from its reverse (31222), we obtain a palindrome (9009).

The spelling of 22213 in words is "twenty-two thousand, two hundred thirteen".