2208216319825 has 6 divisors (see below), whose sum is σ = 2738188236614. Its totient is φ = 1766573055840.

The previous prime is 2208216319823. The next prime is 2208216319847. The reversal of 2208216319825 is 5289136128022.

It can be written as a sum of positive squares in 3 ways, for example, as 447680089921 + 1760536229904 = 669089^2 + 1326852^2 .

It is not a de Polignac number, because 2208216319825 - 2¹ = 2208216319823 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2208216319823) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 44164326372 + ... + 44164326421.

Almost surely, 2^{2208216319825} is an apocalyptic number.

2208216319825 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

2208216319825 is a deficient number, since it is larger than the sum of its proper divisors (529971916789).

2208216319825 is an equidigital number, since it uses as much as digits as its factorization.

2208216319825 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 88328652803 (or 88328652798 counting only the distinct ones).

The product of its (nonzero) digits is 829440, while the sum is 49.

The spelling of 2208216319825 in words is "two trillion, two hundred eight billion, two hundred sixteen million, three hundred nineteen thousand, eight hundred twenty-five".