22220210 has 16 divisors (see below), whose sum is σ = 40253976. Its totient is φ = 8830848.

The previous prime is 22220203. The next prime is 22220213. The reversal of 22220210 is 1202222.

It can be written as a sum of positive squares in 4 ways, for example, as 14508481 + 7711729 = 3809^2 + 2777^2 .

It is a junction number, because it is equal to n+sod(n) for n = 22220191 and 22220200.

It is not an unprimeable number, because it can be changed into a prime (22220213) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5507 + ... + 8646.

Almost surely, 2^22220210 is an apocalyptic number.

22220210 is a deficient number, since it is larger than the sum of its proper divisors (18033766).

22220210 is a wasteful number, since it uses less digits than its factorization.

22220210 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14317.

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

The square root of 22220210 is about 4713.8317746818. The cubic root of 22220210 is about 281.1357356413.

Adding to 22220210 its reverse (1202222), we get a palindrome (23422432).

The spelling of 22220210 in words is "twenty-two million, two hundred twenty thousand, two hundred ten".