191168216 has 8 divisors (see below), whose sum is σ = 358440420. Its totient is φ = 95584104.

The previous prime is 191168207. The next prime is 191168221. The reversal of 191168216 is 612861191.

It is a tau number, because it is divible by the number of its divisors (8).

It is a congruent number.

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 as a sum of consecutive naturals, namely, 11948006 + ... + 11948021.

Almost surely, 2^191168216 is an apocalyptic number.

191168216 is the 7391-st centered heptagonal number.

It is an amenable number.

191168216 is a deficient number, since it is larger than the sum of its proper divisors (167272204).

191168216 is a wasteful number, since it uses less digits than its factorization.

191168216 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23896033 (or 23896029 counting only the distinct ones).

The product of its digits is 5184, while the sum is 35.

The square root of 191168216 is about 13826.3594629968. The cubic root of 191168216 is about 576.0655387745.

The spelling of 191168216 in words is "one hundred ninety-one million, one hundred sixty-eight thousand, two hundred sixteen".