2221289472 has 104 divisors (see below), whose sum is σ = 6068548080. Its totient is φ = 722206720.

The previous prime is 2221289471. The next prime is 2221289489. The reversal of 2221289472 is 2749821222.

It is a self number, because there is not a number n which added to its sum of digits gives 2221289472.

It is not an unprimeable number, because it can be changed into a prime (2221289471) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 501604 + ... + 506012.

Almost surely, 2^2221289472 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 2221289472, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3034274040).

2221289472 is an abundant number, since it is smaller than the sum of its proper divisors (3847258608).

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

2221289472 is an equidigital number, since it uses as much as digits as its factorization.

2221289472 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4477 (or 4455 counting only the distinct ones).

The product of its digits is 64512, while the sum is 39.

The square root of 2221289472 is about 47130.5577306274. The cubic root of 2221289472 is about 1304.7732751554.

The spelling of 2221289472 in words is "two billion, two hundred twenty-one million, two hundred eighty-nine thousand, four hundred seventy-two".