22221234 has 48 divisors (see below), whose sum is σ = 56808960. Its totient is φ = 6143040.

The previous prime is 22221233. The next prime is 22221247. The reversal of 22221234 is 43212222.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22221233) 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 23 ways as a sum of consecutive naturals, for example, 1062 + ... + 6750.

It is an arithmetic number, because the mean of its divisors is an integer number (1183520).

Almost surely, 2^22221234 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 22221234, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28404480).

22221234 is an abundant number, since it is smaller than the sum of its proper divisors (34587726).

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

22221234 is a wasteful number, since it uses less digits than its factorization.

22221234 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5735 (or 5732 counting only the distinct ones).

The product of its digits is 384, while the sum is 18.

The square root of 22221234 is about 4713.9403899498. The cubic root of 22221234 is about 281.1400542110.

Adding to 22221234 its reverse (43212222), we get a palindrome (65433456).

The spelling of 22221234 in words is "twenty-two million, two hundred twenty-one thousand, two hundred thirty-four".