22236212 has 12 divisors (see below), whose sum is σ = 39129636. Its totient is φ = 11056320.

The previous prime is 22236211. The next prime is 22236233. The reversal of 22236212 is 21263222.

It can be written as a sum of positive squares in 2 ways, for example, as 8737936 + 13498276 = 2956^2 + 3674^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22236211) 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 3 ways as a sum of consecutive naturals, for example, 14633 + ... + 16080.

It is an arithmetic number, because the mean of its divisors is an integer number (3260803).

Almost surely, 2^22236212 is an apocalyptic number.

It is an amenable number.

22236212 is a deficient number, since it is larger than the sum of its proper divisors (16893424).

22236212 is a wasteful number, since it uses less digits than its factorization.

22236212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30898 (or 30896 counting only the distinct ones).

The product of its digits is 576, while the sum is 20.

The square root of 22236212 is about 4715.5288144597. The cubic root of 22236212 is about 281.2032065690.

Adding to 22236212 its reverse (21263222), we get a palindrome (43499434).

The spelling of 22236212 in words is "twenty-two million, two hundred thirty-six thousand, two hundred twelve".