22006212 has 12 divisors (see below), whose sum is σ = 51347856. Its totient is φ = 7335400.

The previous prime is 22006207. The next prime is 22006223. The reversal of 22006212 is 21260022.

It is a tau number, because it is divible by the number of its divisors (12).

It is a super-3 number, since 3×22006212³ (a number of 23 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 22006191 and 22006200.

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 3 ways as a sum of consecutive naturals, for example, 916914 + ... + 916937.

It is an arithmetic number, because the mean of its divisors is an integer number (4278988).

Almost surely, 2^22006212 is an apocalyptic number.

It is an amenable number.

22006212 is an abundant number, since it is smaller than the sum of its proper divisors (29341644).

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

22006212 is a wasteful number, since it uses less digits than its factorization.

22006212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1833858 (or 1833856 counting only the distinct ones).

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

The square root of 22006212 is about 4691.0779145096. The cubic root of 22006212 is about 280.2303037175.

Adding to 22006212 its reverse (21260022), we get a palindrome (43266234).

The spelling of 22006212 in words is "twenty-two million, six thousand, two hundred twelve".