2191734194 has 8 divisors (see below), whose sum is σ = 3540493740. Its totient is φ = 1011569616.

The previous prime is 2191734191. The next prime is 2191734229. The reversal of 2191734194 is 4914371912.

It can be written as a sum of positive squares in 2 ways, for example, as 2190708025 + 1026169 = 46805^2 + 1013^2 .

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 (2191734191) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 42148709 + ... + 42148760.

Almost surely, 2^2191734194 is an apocalyptic number.

2191734194 is a deficient number, since it is larger than the sum of its proper divisors (1348759546).

2191734194 is a wasteful number, since it uses less digits than its factorization.

2191734194 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 84297484.

The product of its digits is 54432, while the sum is 41.

The square root of 2191734194 is about 46815.9608894232. The cubic root of 2191734194 is about 1298.9605485862.

The spelling of 2191734194 in words is "two billion, one hundred ninety-one million, seven hundred thirty-four thousand, one hundred ninety-four".