22221320 has 32 divisors (see below), whose sum is σ = 54544320. Its totient is φ = 8080320.

The previous prime is 22221319. The next prime is 22221343. The reversal of 22221320 is 2312222.

It is a junction number, because it is equal to n+sod(n) for n = 22221295 and 22221304.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 24812 + ... + 25691.

It is an arithmetic number, because the mean of its divisors is an integer number (1704510).

Almost surely, 2^22221320 is an apocalyptic number.

22221320 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

22221320 is an abundant number, since it is smaller than the sum of its proper divisors (32323000).

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

22221320 is a wasteful number, since it uses less digits than its factorization.

22221320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50525 (or 50521 counting only the distinct ones).

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

The square root of 22221320 is about 4713.9495118213. The cubic root of 22221320 is about 281.1404168973.

Adding to 22221320 its reverse (2312222), we get a palindrome (24533542).

The spelling of 22221320 in words is "twenty-two million, two hundred twenty-one thousand, three hundred twenty".