2221544240 has 80 divisors (see below), whose sum is σ = 5403672000. Its totient is φ = 847773696.

The previous prime is 2221544233. The next prime is 2221544279. The reversal of 2221544240 is 424451222.

It is a tau number, because it is divible by the number of its divisors (80).

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 15 ways as a sum of consecutive naturals, for example, 824816 + ... + 827504.

It is an arithmetic number, because the mean of its divisors is an integer number (67545900).

Almost surely, 2^2221544240 is an apocalyptic number.

2221544240 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2221544240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2701836000).

2221544240 is an abundant number, since it is smaller than the sum of its proper divisors (3182127760).

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

2221544240 is a wasteful number, since it uses less digits than its factorization.

2221544240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3174 (or 3168 counting only the distinct ones).

The product of its (nonzero) digits is 5120, while the sum is 26.

The square root of 2221544240 is about 47133.2604431308. The cubic root of 2221544240 is about 1304.8231563579.

Adding to 2221544240 its reverse (424451222), we get a palindrome (2645995462).

The spelling of 2221544240 in words is "two billion, two hundred twenty-one million, five hundred forty-four thousand, two hundred forty".