2191042480 has 80 divisors (see below), whose sum is σ = 5579000064. Its totient is φ = 793629440.

The previous prime is 2191042457. The next prime is 2191042489. The reversal of 2191042480 is 842401912.

It is a tau number, because it is divible by the number of its divisors (80).

It is not an unprimeable number, because it can be changed into a prime (2191042489) 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 15 ways as a sum of consecutive naturals, for example, 226707 + ... + 236173.

Almost surely, 2^2191042480 is an apocalyptic number.

2191042480 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 2191042480, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2789500032).

2191042480 is an abundant number, since it is smaller than the sum of its proper divisors (3387957584).

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

2191042480 is a wasteful number, since it uses less digits than its factorization.

2191042480 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9754 (or 9748 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 31.

The square root of 2191042480 is about 46808.5727191078. The cubic root of 2191042480 is about 1298.8238830271.

The spelling of 2191042480 in words is "two billion, one hundred ninety-one million, forty-two thousand, four hundred eighty".