22133220 has 48 divisors (see below), whose sum is σ = 62233920. Its totient is φ = 5877376.

The previous prime is 22133203. The next prime is 22133263. The reversal of 22133220 is 2233122.

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 22133220.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 16951 + ... + 18209.

It is an arithmetic number, because the mean of its divisors is an integer number (1296540).

Almost surely, 2^22133220 is an apocalyptic number.

22133220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

22133220 is an abundant number, since it is smaller than the sum of its proper divisors (40100700).

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

22133220 is a wasteful number, since it uses less digits than its factorization.

22133220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1564 (or 1562 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 15.

The square root of 22133220 is about 4704.5956255559. The cubic root of 22133220 is about 280.7683826545.

Adding to 22133220 its reverse (2233122), we get a palindrome (24366342).

The spelling of 22133220 in words is "twenty-two million, one hundred thirty-three thousand, two hundred twenty".