2209721472 has 448 divisors, whose sum is σ = 8026992000. Its totient is φ = 591224832.

The previous prime is 2209721471. The next prime is 2209721473. The reversal of 2209721472 is 2741279022.

It is an interprime number because it is at equal distance from previous prime (2209721471) and next prime (2209721473).

It is a tau number, because it is divible by the number of its divisors (448).

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 (2209721471) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 55 ways as a sum of consecutive naturals, for example, 11104029 + ... + 11104227.

Almost surely, 2^2209721472 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2209721472, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4013496000).

2209721472 is an abundant number, since it is smaller than the sum of its proper divisors (5817270528).

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

2209721472 is an equidigital number, since it uses as much as digits as its factorization.

2209721472 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 255 (or 228 counting only the distinct ones).

The product of its (nonzero) digits is 28224, while the sum is 36.

The square root of 2209721472 is about 47007.6746074511. The cubic root of 2209721472 is about 1302.5043385834.

The spelling of 2209721472 in words is "two billion, two hundred nine million, seven hundred twenty-one thousand, four hundred seventy-two".