2221470720 has 528 divisors, whose sum is σ = 9012826368. Its totient is φ = 495452160.

The previous prime is 2221470707. The next prime is 2221470721. The reversal of 2221470720 is 270741222.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2221470721) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 22901712 + ... + 22901808.

Almost surely, 2^2221470720 is an apocalyptic number.

2221470720 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 2221470720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4506413184).

2221470720 is an abundant number, since it is smaller than the sum of its proper divisors (6791355648).

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

2221470720 is a wasteful number, since it uses less digits than its factorization.

2221470720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 206 (or 185 counting only the distinct ones).

The product of its (nonzero) digits is 3136, while the sum is 27.

The square root of 2221470720 is about 47132.4805203376. The cubic root of 2221470720 is about 1304.8087622178.

The spelling of 2221470720 in words is "two billion, two hundred twenty-one million, four hundred seventy thousand, seven hundred twenty".