2219555844 has 120 divisors (see below), whose sum is σ = 6605299008. Its totient is φ = 643325760.

The previous prime is 2219555839. The next prime is 2219555873. The reversal of 2219555844 is 4485559122.

2219555844 is a `hidden beast` number, since 2 + 2 + 1 + 95 + 558 + 4 + 4 = 666.

It is a self number, because there is not a number n which added to its sum of digits gives 2219555844.

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 68434 + ... + 95510.

Almost surely, 2^2219555844 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 2219555844, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3302649504).

2219555844 is an abundant number, since it is smaller than the sum of its proper divisors (4385743164).

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

2219555844 is a wasteful number, since it uses less digits than its factorization.

2219555844 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27127 (or 27116 counting only the distinct ones).

The product of its digits is 576000, while the sum is 45.

The square root of 2219555844 is about 47112.1623787319. The cubic root of 2219555844 is about 1304.4337456115.

The spelling of 2219555844 in words is "two billion, two hundred nineteen million, five hundred fifty-five thousand, eight hundred forty-four".