2221945188 has 24 divisors (see below), whose sum is σ = 5185327392. Its totient is φ = 740535744.

The previous prime is 2221945097. The next prime is 2221945207. The reversal of 2221945188 is 8815491222.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 116631 + ... + 134337.

It is an arithmetic number, because the mean of its divisors is an integer number (216055308).

Almost surely, 2^2221945188 is an apocalyptic number.

It is an amenable number.

2221945188 is an abundant number, since it is smaller than the sum of its proper divisors (2963382204).

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

2221945188 is a wasteful number, since it uses less digits than its factorization.

2221945188 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28171 (or 28169 counting only the distinct ones).

The product of its digits is 92160, while the sum is 42.

The square root of 2221945188 is about 47137.5135958612. The cubic root of 2221945188 is about 1304.9016505204.

The spelling of 2221945188 in words is "two billion, two hundred twenty-one million, nine hundred forty-five thousand, one hundred eighty-eight".