199751216 has 20 divisors (see below), whose sum is σ = 442306512. Its totient is φ = 85607616.

The previous prime is 199751213. The next prime is 199751219. The reversal of 199751216 is 612157991.

It is an interprime number because it is at equal distance from previous prime (199751213) and next prime (199751219).

It is not an unprimeable number, because it can be changed into a prime (199751213) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 891635 + ... + 891858.

Almost surely, 2^199751216 is an apocalyptic number.

199751216 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

199751216 is an abundant number, since it is smaller than the sum of its proper divisors (242555296).

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

199751216 is a wasteful number, since it uses less digits than its factorization.

199751216 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1783508 (or 1783502 counting only the distinct ones).

The product of its digits is 34020, while the sum is 41.

The square root of 199751216 is about 14133.3370440247. The cubic root of 199751216 is about 584.5609640869.

The spelling of 199751216 in words is "one hundred ninety-nine million, seven hundred fifty-one thousand, two hundred sixteen".