22297212 has 72 divisors (see below), whose sum is σ = 67232256. Its totient is φ = 6092064.

The previous prime is 22297211. The next prime is 22297213. The reversal of 22297212 is 21279222.

It is an interprime number because it is at equal distance from previous prime (22297211) and next prime (22297213).

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22297211) by changing a digit.

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 23 ways as a sum of consecutive naturals, for example, 3873 + ... + 7719.

Almost surely, 2^22297212 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 22297212, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (33616128).

22297212 is an abundant number, since it is smaller than the sum of its proper divisors (44935044).

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

22297212 is a wasteful number, since it uses less digits than its factorization.

22297212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3887 (or 3882 counting only the distinct ones).

The product of its digits is 2016, while the sum is 27.

The square root of 22297212 is about 4721.9923761057. The cubic root of 22297212 is about 281.4601108472.

The spelling of 22297212 in words is "twenty-two million, two hundred ninety-seven thousand, two hundred twelve".