159918 has 16 divisors (see below), whose sum is σ = 349056. Its totient is φ = 48440.

The previous prime is 159911. The next prime is 159931. The reversal of 159918 is 819951.

159918 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (159911) by changing a digit.

159918 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1146 + ... + 1277.

It is an arithmetic number, because the mean of its divisors is an integer number (21816).

2¹⁵⁹⁹¹⁸ is an apocalyptic number.

159918 is an abundant number, since it is smaller than the sum of its proper divisors (189138).

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

159918 is a wasteful number, since it uses less digits than its factorization.

159918 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2439.

The product of its digits is 3240, while the sum is 33.

The square root of 159918 is about 399.8974868638. The cubic root of 159918 is about 54.2790764869.

Adding to 159918 its sum of digits (33), we get a palindrome (159951).

It can be divided in two parts, 1599 and 18, that multiplied together give a palindrome (28782).

The spelling of 159918 in words is "one hundred fifty-nine thousand, nine hundred eighteen".