22213212 has 24 divisors (see below), whose sum is σ = 59235456. Its totient is φ = 6346608.

The previous prime is 22213183. The next prime is 22213259. The reversal of 22213212 is 21231222.

It is a happy number.

It is a nude number because it is divisible by every one of its digits.

It is a junction number, because it is equal to n+sod(n) for n = 22213191 and 22213200.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 132138 + ... + 132305.

It is an arithmetic number, because the mean of its divisors is an integer number (2468144).

Almost surely, 2^22213212 is an apocalyptic number.

It is an amenable number.

22213212 is an abundant number, since it is smaller than the sum of its proper divisors (37022244).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

22213212 is a wasteful number, since it uses less digits than its factorization.

22213212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 264457 (or 264455 counting only the distinct ones).

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

The square root of 22213212 is about 4713.0894326333. The cubic root of 22213212 is about 281.1062190519.

Adding to 22213212 its reverse (21231222), we get a palindrome (43444434).

The spelling of 22213212 in words is "twenty-two million, two hundred thirteen thousand, two hundred twelve".