22210220 has 24 divisors (see below), whose sum is σ = 47301408. Its totient is φ = 8758400.

The previous prime is 22210213. The next prime is 22210267. The reversal of 22210220 is 2201222.

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 7 ways as a sum of consecutive naturals, for example, 6401 + ... + 9240.

It is an arithmetic number, because the mean of its divisors is an integer number (1970892).

Almost surely, 2^22210220 is an apocalyptic number.

22210220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

22210220 is an abundant number, since it is smaller than the sum of its proper divisors (25091188).

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

22210220 is a wasteful number, since it uses less digits than its factorization.

22210220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15721 (or 15719 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 11.

The square root of 22210220 is about 4712.7720080649. The cubic root of 22210220 is about 281.0935973207.

Adding to 22210220 its reverse (2201222), we get a palindrome (24411442).

The spelling of 22210220 in words is "twenty-two million, two hundred ten thousand, two hundred twenty".