22210505 has 4 divisors (see below), whose sum is σ = 26652612. Its totient is φ = 17768400.

The previous prime is 22210501. The next prime is 22210511. The reversal of 22210505 is 50501222.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 14235529 + 7974976 = 3773^2 + 2824^2 .

It is not a de Polignac number, because 22210505 - 2² = 22210501 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (22210501) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2221046 + ... + 2221055.

It is an arithmetic number, because the mean of its divisors is an integer number (6663153).

Almost surely, 2^22210505 is an apocalyptic number.

It is an amenable number.

22210505 is a deficient number, since it is larger than the sum of its proper divisors (4442107).

22210505 is an equidigital number, since it uses as much as digits as its factorization.

22210505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4442106.

The product of its (nonzero) digits is 200, while the sum is 17.

The square root of 22210505 is about 4712.8022449494. The cubic root of 22210505 is about 281.0947996400.

Adding to 22210505 its reverse (50501222), we get a palindrome (72711727).

The spelling of 22210505 in words is "twenty-two million, two hundred ten thousand, five hundred five".