2191043594 has 8 divisors (see below), whose sum is σ = 3289419300. Its totient is φ = 1094570496.

The previous prime is 2191043587. The next prime is 2191043597. The reversal of 2191043594 is 4953401912.

It can be written as a sum of positive squares in 2 ways, for example, as 2165692369 + 25351225 = 46537^2 + 5035^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (2191043597) 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 3 ways as a sum of consecutive naturals, for example, 472769 + ... + 477380.

Almost surely, 2^2191043594 is an apocalyptic number.

2191043594 is a deficient number, since it is larger than the sum of its proper divisors (1098375706).

2191043594 is a wasteful number, since it uses less digits than its factorization.

2191043594 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 951304.

The product of its (nonzero) digits is 38880, while the sum is 38.

The square root of 2191043594 is about 46808.5846186359. The cubic root of 2191043594 is about 1298.8241031490.

The spelling of 2191043594 in words is "two billion, one hundred ninety-one million, forty-three thousand, five hundred ninety-four".