22261236 has 48 divisors (see below), whose sum is σ = 55104000. Its totient is φ = 6975072.

The previous prime is 22261207. The next prime is 22261247. The reversal of 22261236 is 63216222.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 36865 + ... + 37463.

It is an arithmetic number, because the mean of its divisors is an integer number (1148000).

Almost surely, 2^22261236 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 22261236, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27552000).

22261236 is an abundant number, since it is smaller than the sum of its proper divisors (32842764).

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

22261236 is a wasteful number, since it uses less digits than its factorization.

22261236 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 788 (or 786 counting only the distinct ones).

The product of its digits is 1728, while the sum is 24.

The square root of 22261236 is about 4718.1814293221. The cubic root of 22261236 is about 281.3086530513.

Adding to 22261236 its reverse (63216222), we get a palindrome (85477458).

The spelling of 22261236 in words is "twenty-two million, two hundred sixty-one thousand, two hundred thirty-six".