191040218 has 8 divisors (see below), whose sum is σ = 287750100. Its totient is φ = 95123520.

The previous prime is 191040181. The next prime is 191040221. The reversal of 191040218 is 812040191.

191040218 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 185313769 + 5726449 = 13613^2 + 2393^2 .

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

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 197693 + ... + 198656.

Almost surely, 2^191040218 is an apocalyptic number.

191040218 is a deficient number, since it is larger than the sum of its proper divisors (96709882).

191040218 is a wasteful number, since it uses less digits than its factorization.

191040218 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 396592.

The product of its (nonzero) digits is 576, while the sum is 26.

The square root of 191040218 is about 13821.7299206720. The cubic root of 191040218 is about 575.9369405149.

The spelling of 191040218 in words is "one hundred ninety-one million, forty thousand, two hundred eighteen".