159999217 has 8 divisors (see below), whose sum is σ = 183007616. Its totient is φ = 137028672.

The previous prime is 159999187. The next prime is 159999221. The reversal of 159999217 is 712999951.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 159999217 - 2⁷ = 159999089 is a prime.

It is a super-2 number, since 2×159999217² = 51199498881226178, which contains 22 as substring.

It is a pancake number, because a pancake can be divided into 159999217 parts by 17888 straight cuts.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (159999227) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 268 + ... + 17890.

It is an arithmetic number, because the mean of its divisors is an integer number (22875952).

Almost surely, 2^159999217 is an apocalyptic number.

It is an amenable number.

159999217 is a deficient number, since it is larger than the sum of its proper divisors (23008399).

159999217 is a wasteful number, since it uses less digits than its factorization.

159999217 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18927.

The product of its digits is 459270, while the sum is 52.

The square root of 159999217 is about 12649.0796898431. The cubic root of 159999217 is about 542.8826377388.

The spelling of 159999217 in words is "one hundred fifty-nine million, nine hundred ninety-nine thousand, two hundred seventeen".