2209973220 has 576 divisors, whose sum is σ = 9040711680. Its totient is φ = 440059392.

The previous prime is 2209973197. The next prime is 2209973221. The reversal of 2209973220 is 223799022.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2209973221) by changing a digit.

It is a polite number, since it can be written in 191 ways as a sum of consecutive naturals, for example, 8402809 + ... + 8403071.

It is an arithmetic number, because the mean of its divisors is an integer number (15695680).

Almost surely, 2^2209973220 is an apocalyptic number.

2209973220 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 2209973220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4520355840).

2209973220 is an abundant number, since it is smaller than the sum of its proper divisors (6830738460).

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

2209973220 is a wasteful number, since it uses less digits than its factorization.

2209973220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 326 (or 312 counting only the distinct ones).

The product of its (nonzero) digits is 27216, while the sum is 36.

The square root of 2209973220 is about 47010.3522641556. The cubic root of 2209973220 is about 1302.5538003843.

The spelling of 2209973220 in words is "two billion, two hundred nine million, nine hundred seventy-three thousand, two hundred twenty".