2208121056 has 72 divisors (see below), whose sum is σ = 6298254144. Its totient is φ = 733824000.

The previous prime is 2208121001. The next prime is 2208121063. The reversal of 2208121056 is 6501218022.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (72).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 85681 + ... + 108431.

It is an arithmetic number, because the mean of its divisors is an integer number (87475752).

Almost surely, 2^2208121056 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2208121056, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3149127072).

2208121056 is an abundant number, since it is smaller than the sum of its proper divisors (4090133088).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2208121056 is a wasteful number, since it uses less digits than its factorization.

2208121056 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23104 (or 23093 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 27.

The square root of 2208121056 is about 46990.6486016101. The cubic root of 2208121056 is about 1302.1898114261.

Adding to 2208121056 its reverse (6501218022), we get a palindrome (8709339078).

The spelling of 2208121056 in words is "two billion, two hundred eight million, one hundred twenty-one thousand, fifty-six".