22000205 has 4 divisors (see below), whose sum is σ = 26400252. Its totient is φ = 17600160.

The previous prime is 22000201. The next prime is 22000211. The reversal of 22000205 is 50200022.

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 11202409 + 10797796 = 3347^2 + 3286^2 .

It is not a de Polignac number, because 22000205 - 2² = 22000201 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22000201) 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, 2200016 + ... + 2200025.

It is an arithmetic number, because the mean of its divisors is an integer number (6600063).

Almost surely, 2^22000205 is an apocalyptic number.

It is an amenable number.

22000205 is a deficient number, since it is larger than the sum of its proper divisors (4400047).

22000205 is an equidigital number, since it uses as much as digits as its factorization.

22000205 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4400046.

The product of its (nonzero) digits is 40, while the sum is 11.

The square root of 22000205 is about 4690.4376128459. The cubic root of 22000205 is about 280.2048033932.

Adding to 22000205 its reverse (50200022), we get a palindrome (72200227).

The spelling of 22000205 in words is "twenty-two million, two hundred five", and thus it is an aban number.