222808213 has 4 divisors (see below), whose sum is σ = 223123180. Its totient is φ = 222493248.

The previous prime is 222808181. The next prime is 222808217. The reversal of 222808213 is 312808222.

222808213 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 312808222 = 2 ⋅156404111.

It can be written as a sum of positive squares in 2 ways, for example, as 33663204 + 189145009 = 5802^2 + 13753^2 .

It is a cyclic number.

It is not a de Polignac number, because 222808213 - 2⁵ = 222808181 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 (222808217) 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, 156420 + ... + 157837.

It is an arithmetic number, because the mean of its divisors is an integer number (55780795).

Almost surely, 2^222808213 is an apocalyptic number.

It is an amenable number.

222808213 is a deficient number, since it is larger than the sum of its proper divisors (314967).

222808213 is an equidigital number, since it uses as much as digits as its factorization.

222808213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 314966.

The product of its (nonzero) digits is 3072, while the sum is 28.

The square root of 222808213 is about 14926.7616380781. The cubic root of 222808213 is about 606.2388049373.

Subtracting 222808213 from its reverse (312808222), we obtain a palindrome (90000009).

The spelling of 222808213 in words is "two hundred twenty-two million, eight hundred eight thousand, two hundred thirteen".