22136212 has 48 divisors (see below), whose sum is σ = 47496960. Its totient is φ = 8819712.

The previous prime is 22136209. The next prime is 22136239. The reversal of 22136212 is 21263122.

It is a self number, because there is not a number n which added to its sum of digits gives 22136212.

It is a congruent number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 23364 + ... + 24292.

It is an arithmetic number, because the mean of its divisors is an integer number (989520).

Almost surely, 2^22136212 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 22136212, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (23748480).

22136212 is an abundant number, since it is smaller than the sum of its proper divisors (25360748).

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

22136212 is a wasteful number, since it uses less digits than its factorization.

22136212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1000 (or 998 counting only the distinct ones).

The product of its digits is 288, while the sum is 19.

The square root of 22136212 is about 4704.9136017572. The cubic root of 22136212 is about 280.7810336402.

Adding to 22136212 its reverse (21263122), we get a palindrome (43399334).

The spelling of 22136212 in words is "twenty-two million, one hundred thirty-six thousand, two hundred twelve".