2216522225 has 6 divisors (see below), whose sum is σ = 2748487590. Its totient is φ = 1773217760.

The previous prime is 2216522201. The next prime is 2216522251. The reversal of 2216522225 is 5222256122.

It can be written as a sum of positive squares in 3 ways, for example, as 30118144 + 2186404081 = 5488^2 + 46759^2 .

It is not a de Polignac number, because 2216522225 - 2²⁸ = 1948086769 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 44330420 + ... + 44330469.

It is an arithmetic number, because the mean of its divisors is an integer number (458081265).

Almost surely, 2^2216522225 is an apocalyptic number.

2216522225 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

2216522225 is a deficient number, since it is larger than the sum of its proper divisors (531965365).

2216522225 is an equidigital number, since it uses as much as digits as its factorization.

2216522225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 88660899 (or 88660894 counting only the distinct ones).

The product of its digits is 9600, while the sum is 29.

The square root of 2216522225 is about 47079.9556605569. The cubic root of 2216522225 is about 1303.8391883395.

Adding to 2216522225 its reverse (5222256122), we get a palindrome (7438778347).

The spelling of 2216522225 in words is "two billion, two hundred sixteen million, five hundred twenty-two thousand, two hundred twenty-five".