191066112 has 156 divisors (see below), whose sum is σ = 567341424. Its totient is φ = 61931520.

The previous prime is 191066093. The next prime is 191066119. The reversal of 191066112 is 211660191.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (191066119) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2617308 + ... + 2617380.

It is an arithmetic number, because the mean of its divisors is an integer number (3636804).

Almost surely, 2^191066112 is an apocalyptic number.

191066112 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 191066112, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (283670712).

191066112 is an abundant number, since it is smaller than the sum of its proper divisors (376275312).

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

191066112 is an equidigital number, since it uses as much as digits as its factorization.

191066112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 174 (or 149 counting only the distinct ones).

The product of its (nonzero) digits is 648, while the sum is 27.

The square root of 191066112 is about 13822.6666023601. Note that the first 4 decimals coincide. The cubic root of 191066112 is about 575.9629605812.

The spelling of 191066112 in words is "one hundred ninety-one million, sixty-six thousand, one hundred twelve".