159885181 has 2 divisors, whose sum is σ = 159885182. Its totient is φ = 159885180.

The previous prime is 159885161. The next prime is 159885191. The reversal of 159885181 is 181588951.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 103124025 + 56761156 = 10155^2 + 7534^2 .

It is a cyclic number.

It is not a de Polignac number, because 159885181 - 2²⁵ = 126330749 is a prime.

It is a super-2 number, since 2×159885181² = 51126542206805522, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (159885151) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 79942590 + 79942591.

It is an arithmetic number, because the mean of its divisors is an integer number (79942591).

Almost surely, 2^159885181 is an apocalyptic number.

It is an amenable number.

159885181 is a deficient number, since it is larger than the sum of its proper divisors (1).

159885181 is an equidigital number, since it uses as much as digits as its factorization.

159885181 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 115200, while the sum is 46.

The square root of 159885181 is about 12644.5712066483. The cubic root of 159885181 is about 542.7536311112.

It can be divided in two parts, 15988 and 5181, that multiplied together give a palindrome (82833828).

The spelling of 159885181 in words is "one hundred fifty-nine million, eight hundred eighty-five thousand, one hundred eighty-one".