2221244225 has 24 divisors (see below), whose sum is σ = 2946483288. Its totient is φ = 1655193600.

The previous prime is 2221244197. The next prime is 2221244227. The reversal of 2221244225 is 5224421222.

It is a happy number.

It can be written as a sum of positive squares in 12 ways, for example, as 328298161 + 1892946064 = 18119^2 + 43508^2 .

It is not a de Polignac number, because 2221244225 - 2¹⁰ = 2221243201 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2221244194 and 2221244203.

It is not an unprimeable number, because it can be changed into a prime (2221244227) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 14285 + ... + 68165.

It is an arithmetic number, because the mean of its divisors is an integer number (122770137).

Almost surely, 2^2221244225 is an apocalyptic number.

2221244225 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

2221244225 is a deficient number, since it is larger than the sum of its proper divisors (725239063).

2221244225 is a wasteful number, since it uses less digits than its factorization.

2221244225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 54005 (or 54000 counting only the distinct ones).

The product of its digits is 5120, while the sum is 26.

The square root of 2221244225 is about 47130.0777105237. The cubic root of 2221244225 is about 1304.7644158152.

Adding to 2221244225 its reverse (5224421222), we get a palindrome (7445665447).

The spelling of 2221244225 in words is "two billion, two hundred twenty-one million, two hundred forty-four thousand, two hundred twenty-five".