4222222225 has 12 divisors (see below), whose sum is σ = 5638291036. Its totient is φ = 3117948480.

The previous prime is 4222222223. The next prime is 4222222243. The reversal of 4222222225 is 5222222224.

It can be written as a sum of positive squares in 6 ways, for example, as 212926464 + 4009295761 = 14592^2 + 63319^2 .

It is not a de Polignac number, because 4222222225 - 2¹ = 4222222223 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (25).

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 4222222225.

It is not an unprimeable number, because it can be changed into a prime (4222222223) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 6495402 + ... + 6496051.

Almost surely, 2^4222222225 is an apocalyptic number.

It is an amenable number.

4222222225 is a deficient number, since it is larger than the sum of its proper divisors (1416068811).

4222222225 is a wasteful number, since it uses less digits than its factorization.

4222222225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12991476 (or 12991471 counting only the distinct ones).

The product of its digits is 5120, while the sum is 25.

The square root of 4222222225 is about 64978.6289867676. The cubic root of 4222222225 is about 1616.2691956344.

Adding to 4222222225 its reverse (5222222224), we get a palindrome (9444444449).

Subtracting 4222222225 from its reverse (5222222224), we obtain a palindrome (999999999).

The spelling of 4222222225 in words is "four billion, two hundred twenty-two million, two hundred twenty-two thousand, two hundred twenty-five".