191109512230 has 32 divisors (see below), whose sum is σ = 423381075264. Its totient is φ = 60483010176.

The previous prime is 191109512063. The next prime is 191109512233. The reversal of 191109512230 is 32215901191.

It is a happy number.

It is a Smith number, since the sum of its digits (34) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (191109512233) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 105004317 + ... + 105006136.

It is an arithmetic number, because the mean of its divisors is an integer number (13230658602).

Almost surely, 2^191109512230 is an apocalyptic number.

191109512230 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

191109512230 is an abundant number, since it is smaller than the sum of its proper divisors (232271563034).

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

191109512230 is a wasteful number, since it uses less digits than its factorization.

191109512230 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 210010480.

The product of its (nonzero) digits is 4860, while the sum is 34.

The spelling of 191109512230 in words is "one hundred ninety-one billion, one hundred nine million, five hundred twelve thousand, two hundred thirty".