159999218 has 16 divisors (see below), whose sum is σ = 244430784. Its totient is φ = 78527760.

The previous prime is 159999187. The next prime is 159999221. The reversal of 159999218 is 812999951.

It is a super-2 number, since 2×159999218² = 51199499521223048, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 159999218.

It is an unprimeable number.

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, 77921 + ... + 79947.

It is an arithmetic number, because the mean of its divisors is an integer number (15276924).

Almost surely, 2^159999218 is an apocalyptic number.

159999218 is a deficient number, since it is larger than the sum of its proper divisors (84431566).

159999218 is a wasteful number, since it uses less digits than its factorization.

159999218 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2737.

The product of its digits is 524880, while the sum is 53.

The square root of 159999218 is about 12649.0797293716. The cubic root of 159999218 is about 542.8826388698.

The spelling of 159999218 in words is "one hundred fifty-nine million, nine hundred ninety-nine thousand, two hundred eighteen".