22225000205 has 4 divisors (see below), whose sum is σ = 26670000252. Its totient is φ = 17780000160.

The previous prime is 22225000183. The next prime is 22225000219. The reversal of 22225000205 is 50200052222.

It is a happy number.

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 13040269636 + 9184730569 = 114194^2 + 95837^2 .

It is not a de Polignac number, because 22225000205 - 2¹² = 22224996109 is a prime.

It is a super-2 number, since 2×22225000205² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2222500016 + ... + 2222500025.

It is an arithmetic number, because the mean of its divisors is an integer number (6667500063).

Almost surely, 2^22225000205 is an apocalyptic number.

It is an amenable number.

22225000205 is a deficient number, since it is larger than the sum of its proper divisors (4445000047).

22225000205 is an equidigital number, since it uses as much as digits as its factorization.

22225000205 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4445000046.

The product of its (nonzero) digits is 800, while the sum is 20.

Adding to 22225000205 its reverse (50200052222), we get a palindrome (72425052427).

The spelling of 22225000205 in words is "twenty-two billion, two hundred twenty-five million, two hundred five", and thus it is an aban number.