199191216 has 80 divisors (see below), whose sum is σ = 591858944. Its totient is φ = 56547072.

The previous prime is 199191199. The next prime is 199191229. The reversal of 199191216 is 612191991.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 52950 + ... + 56586.

Almost surely, 2^199191216 is an apocalyptic number.

199191216 is a gapful number since it is divisible by the number (16) 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 199191216, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (295929472).

199191216 is an abundant number, since it is smaller than the sum of its proper divisors (392667728).

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

199191216 is a wasteful number, since it uses less digits than its factorization.

199191216 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3818 (or 3812 counting only the distinct ones).

The product of its digits is 8748, while the sum is 39.

The square root of 199191216 is about 14113.5118237808. The cubic root of 199191216 is about 584.0141830546.

The spelling of 199191216 in words is "one hundred ninety-nine million, one hundred ninety-one thousand, two hundred sixteen".