159831168 has 128 divisors (see below), whose sum is σ = 491003520. Its totient is φ = 45121536.

The previous prime is 159831167. The next prime is 159831179. The reversal of 159831168 is 861138951.

It is a tau number, because it is divible by the number of its divisors (128).

It is a Harshad number since it is a multiple of its sum of digits (42).

It is not an unprimeable number, because it can be changed into a prime (159831167) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 260430 + ... + 261042.

It is an arithmetic number, because the mean of its divisors is an integer number (3835965).

Almost surely, 2^159831168 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 159831168, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (245501760).

159831168 is an abundant number, since it is smaller than the sum of its proper divisors (331172352).

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

159831168 is an equidigital number, since it uses as much as digits as its factorization.

159831168 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 734 (or 722 counting only the distinct ones).

The product of its digits is 51840, while the sum is 42.

The square root of 159831168 is about 12642.4352084557. The cubic root of 159831168 is about 542.6925058848.

The spelling of 159831168 in words is "one hundred fifty-nine million, eight hundred thirty-one thousand, one hundred sixty-eight".