159918231 has 16 divisors (see below), whose sum is σ = 244851840. Its totient is φ = 91818720.

The previous prime is 159918229. The next prime is 159918251. The reversal of 159918231 is 132819951.

It is not a de Polignac number, because 159918231 - 2¹ = 159918229 is a prime.

It is a super-2 number, since 2×159918231² = 51147681212338722, 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 159918231.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (159918221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 126900 + ... + 128153.

It is an arithmetic number, because the mean of its divisors is an integer number (15303240).

Almost surely, 2^159918231 is an apocalyptic number.

159918231 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

159918231 is a deficient number, since it is larger than the sum of its proper divisors (84933609).

159918231 is a wasteful number, since it uses less digits than its factorization.

159918231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 255086.

The product of its digits is 19440, while the sum is 39.

The square root of 159918231 is about 12645.8780240836. The cubic root of 159918231 is about 542.7910262209.

The spelling of 159918231 in words is "one hundred fifty-nine million, nine hundred eighteen thousand, two hundred thirty-one".