22221213 has 8 divisors (see below), whose sum is σ = 33860928. Its totient is φ = 12697824.

The previous prime is 22221211. The next prime is 22221233. The reversal of 22221213 is 31212222.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 22221213 - 2¹ = 22221211 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 22221192 and 22221201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22221211) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 529056 + ... + 529097.

It is an arithmetic number, because the mean of its divisors is an integer number (4232616).

Almost surely, 2^22221213 is an apocalyptic number.

It is an amenable number.

22221213 is a deficient number, since it is larger than the sum of its proper divisors (11639715).

22221213 is a wasteful number, since it uses less digits than its factorization.

22221213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1058163.

The product of its digits is 96, while the sum is 15.

The square root of 22221213 is about 4713.9381625134. The cubic root of 22221213 is about 281.1399656479.

Adding to 22221213 its reverse (31212222), we get a palindrome (53433435).

The spelling of 22221213 in words is "twenty-two million, two hundred twenty-one thousand, two hundred thirteen".