2191443072 has 576 divisors, whose sum is σ = 7996343040. Its totient is φ = 526417920.

The previous prime is 2191443061. The next prime is 2191443083. The reversal of 2191443072 is 2703441912.

It is an interprime number because it is at equal distance from previous prime (2191443061) and next prime (2191443083).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 70691697 + ... + 70691727.

It is an arithmetic number, because the mean of its divisors is an integer number (13882540).

Almost surely, 2^2191443072 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 2191443072, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3998171520).

2191443072 is an abundant number, since it is smaller than the sum of its proper divisors (5804899968).

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

2191443072 is a wasteful number, since it uses less digits than its factorization.

2191443072 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 109 (or 73 counting only the distinct ones).

The product of its (nonzero) digits is 12096, while the sum is 33.

The square root of 2191443072 is about 46812.8515687733. The cubic root of 2191443072 is about 1298.9030335922.

Adding to 2191443072 its reverse (2703441912), we get a palindrome (4894884984).

The spelling of 2191443072 in words is "two billion, one hundred ninety-one million, four hundred forty-three thousand, seventy-two".