22213220 has 48 divisors (see below), whose sum is σ = 50077440. Its totient is φ = 8246784.

The previous prime is 22213183. The next prime is 22213259. The reversal of 22213220 is 2231222.

It is a junction number, because it is equal to n+sod(n) for n = 22213195 and 22213204.

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, 26447 + ... + 27273.

It is an arithmetic number, because the mean of its divisors is an integer number (1043280).

Almost surely, 2^22213220 is an apocalyptic number.

22213220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 22213220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (25038720).

22213220 is an abundant number, since it is smaller than the sum of its proper divisors (27864220).

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

22213220 is a wasteful number, since it uses less digits than its factorization.

22213220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 932 (or 930 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 14.

The square root of 22213220 is about 4713.0902813335. The cubic root of 22213220 is about 281.1062527983.

Adding to 22213220 its reverse (2231222), we get a palindrome (24444442).

The spelling of 22213220 in words is "twenty-two million, two hundred thirteen thousand, two hundred twenty".