2191954096 has 80 divisors (see below), whose sum is σ = 4606580160. Its totient is φ = 1007283200.

The previous prime is 2191954091. The next prime is 2191954097. The reversal of 2191954096 is 6904591912.

It is a happy number.

It is a Smith number, since the sum of its digits (46) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (46).

It is not an unprimeable number, because it can be changed into a prime (2191954091) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 3126546 + ... + 3127246.

It is an arithmetic number, because the mean of its divisors is an integer number (57582252).

Almost surely, 2^2191954096 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 2191954096, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2303290080).

2191954096 is an abundant number, since it is smaller than the sum of its proper divisors (2414626064).

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

2191954096 is a wasteful number, since it uses less digits than its factorization.

2191954096 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1054 (or 1048 counting only the distinct ones).

The product of its (nonzero) digits is 174960, while the sum is 46.

The square root of 2191954096 is about 46818.3094098879. The cubic root of 2191954096 is about 1299.0039897527.

The spelling of 2191954096 in words is "two billion, one hundred ninety-one million, nine hundred fifty-four thousand, ninety-six".