2221044540 has 288 divisors, whose sum is σ = 7466292288. Its totient is φ = 489984000.

The previous prime is 2221044523. The next prime is 2221044563. The reversal of 2221044540 is 454401222.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 2221044540.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 9532264 + ... + 9532496.

It is an arithmetic number, because the mean of its divisors is an integer number (25924626).

Almost surely, 2^2221044540 is an apocalyptic number.

2221044540 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 2221044540, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3733146144).

2221044540 is an abundant number, since it is smaller than the sum of its proper divisors (5245247748).

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

2221044540 is a wasteful number, since it uses less digits than its factorization.

2221044540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 381 (or 368 counting only the distinct ones).

The product of its (nonzero) digits is 2560, while the sum is 24.

The square root of 2221044540 is about 47127.9592174327. The cubic root of 2221044540 is about 1304.7253161539.

Adding to 2221044540 its reverse (454401222), we get a palindrome (2675445762).

The spelling of 2221044540 in words is "two billion, two hundred twenty-one million, forty-four thousand, five hundred forty".