22210000 has 50 divisors (see below), whose sum is σ = 53796842. Its totient is φ = 8880000.

The previous prime is 22209997. The next prime is 22210033. The reversal of 22210000 is 1222.

It is a happy number.

It can be written as a sum of positive squares in 5 ways, for example, as 6780816 + 15429184 = 2604^2 + 3928^2 .

It is a tau number, because it is divible by the number of its divisors (50).

It is a nialpdrome in base 10.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 8890 + ... + 11110.

Almost surely, 2^22210000 is an apocalyptic number.

22210000 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 22210000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26898421).

22210000 is an abundant number, since it is smaller than the sum of its proper divisors (31586842).

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

22210000 is an equidigital number, since it uses as much as digits as its factorization.

22210000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2249 (or 2228 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 7.

The square root of 22210000 is about 4712.7486671793. The cubic root of 22210000 is about 281.0926692075.

Adding to 22210000 its reverse (1222), we get a palindrome (22211222).

The spelling of 22210000 in words is "twenty-two million, two hundred ten thousand".