2221556204 has 24 divisors (see below), whose sum is σ = 4505695488. Its totient is φ = 938684880.

The previous prime is 2221556203. The next prime is 2221556213. The reversal of 2221556204 is 4026551222.

It is not an unprimeable number, because it can be changed into a prime (2221556203) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 556754 + ... + 560729.

It is an arithmetic number, because the mean of its divisors is an integer number (187737312).

Almost surely, 2^2221556204 is an apocalyptic number.

It is an amenable number.

2221556204 is an abundant number, since it is smaller than the sum of its proper divisors (2284139284).

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

2221556204 is a wasteful number, since it uses less digits than its factorization.

2221556204 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1117565 (or 1117563 counting only the distinct ones).

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

The square root of 2221556204 is about 47133.3873597050. The cubic root of 2221556204 is about 1304.8254987039.

The spelling of 2221556204 in words is "two billion, two hundred twenty-one million, five hundred fifty-six thousand, two hundred four".