22126212 has 18 divisors (see below), whose sum is σ = 55930238. Its totient is φ = 7375392.

The previous prime is 22126211. The next prime is 22126229. The reversal of 22126212 is 21262122.

It can be written as a sum of positive squares in only one way, i.e., 19766916 + 2359296 = 4446^2 + 1536^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is a Harshad number since it is a multiple of its sum of digits (18).

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

It is not an unprimeable number, because it can be changed into a prime (22126211) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 307273 + ... + 307344.

Almost surely, 2^22126212 is an apocalyptic number.

It is an amenable number.

22126212 is an abundant number, since it is smaller than the sum of its proper divisors (33804026).

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

22126212 is a wasteful number, since it uses less digits than its factorization.

22126212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 614627 (or 614622 counting only the distinct ones).

The product of its digits is 192, while the sum is 18.

The square root of 22126212 is about 4703.8507629388. The cubic root of 22126212 is about 280.7387464707.

Adding to 22126212 its reverse (21262122), we get a palindrome (43388334).

The spelling of 22126212 in words is "twenty-two million, one hundred twenty-six thousand, two hundred twelve".