2221536240 has 960 divisors, whose sum is σ = 10340766720. Its totient is φ = 425502720.

The previous prime is 2221536227. The next prime is 2221536257. The reversal of 2221536240 is 426351222.

It is a happy number.

2221536240 is a `hidden beast` number, since 2 + 22 + 15 + 3 + 624 + 0 = 666.

2221536240 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 191 ways as a sum of consecutive naturals, for example, 60041502 + ... + 60041538.

It is an arithmetic number, because the mean of its divisors is an integer number (10771632).

Almost surely, 2^2221536240 is an apocalyptic number.

2221536240 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 2221536240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (5170383360).

2221536240 is an abundant number, since it is smaller than the sum of its proper divisors (8119230480).

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

2221536240 is a wasteful number, since it uses less digits than its factorization.

2221536240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 115 (or 84 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 27.

The square root of 2221536240 is about 47133.1755772937. The cubic root of 2221536240 is about 1304.8215900903.

Adding to 2221536240 its reverse (426351222), we get a palindrome (2647887462).

The spelling of 2221536240 in words is "two billion, two hundred twenty-one million, five hundred thirty-six thousand, two hundred forty".