2216620225 has 24 divisors (see below), whose sum is σ = 2927812608. Its totient is φ = 1658937600.

The previous prime is 2216620181. The next prime is 2216620243. The reversal of 2216620225 is 5220266122.

It is not a de Polignac number, because 2216620225 - 2⁷ = 2216620097 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2216620193 and 2216620202.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 55360 + ... + 86590.

It is an arithmetic number, because the mean of its divisors is an integer number (121992192).

Almost surely, 2^2216620225 is an apocalyptic number.

2216620225 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

2216620225 is a deficient number, since it is larger than the sum of its proper divisors (711192383).

2216620225 is a wasteful number, since it uses less digits than its factorization.

2216620225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31425 (or 31420 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 28.

The square root of 2216620225 is about 47080.9964316814. The cubic root of 2216620225 is about 1303.8584037807.

Adding to 2216620225 its reverse (5220266122), we get a palindrome (7436886347).

The spelling of 2216620225 in words is "two billion, two hundred sixteen million, six hundred twenty thousand, two hundred twenty-five".