22043220 has 48 divisors (see below), whose sum is σ = 65354688. Its totient is φ = 5532160.

The previous prime is 22043213. The next prime is 22043227. The reversal of 22043220 is 2234022.

It is an interprime number because it is at equal distance from previous prime (22043213) and next prime (22043227).

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 22043220.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22043227) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9786 + ... + 11825.

It is an arithmetic number, because the mean of its divisors is an integer number (1361556).

Almost surely, 2^22043220 is an apocalyptic number.

22043220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

22043220 is an abundant number, since it is smaller than the sum of its proper divisors (43311468).

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

22043220 is a wasteful number, since it uses less digits than its factorization.

22043220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21640 (or 21638 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 15.

The square root of 22043220 is about 4695.0207667272. The cubic root of 22043220 is about 280.3873041586.

Adding to 22043220 its reverse (2234022), we get a palindrome (24277242).

The spelling of 22043220 in words is "twenty-two million, forty-three thousand, two hundred twenty".