159943881 has 16 divisors (see below), whose sum is σ = 225981440. Its totient is φ = 100342800.

The previous prime is 159943853. The next prime is 159943969. The reversal of 159943881 is 188349951.

It is not a de Polignac number, because 159943881 - 2⁷ = 159943753 is a prime.

It is a super-2 number, since 2×159943881² = 51164090138684322, 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 159943881.

It is not an unprimeable number, because it can be changed into a prime (159943811) 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, 685 + ... + 17898.

It is an arithmetic number, because the mean of its divisors is an integer number (14123840).

Almost surely, 2^159943881 is an apocalyptic number.

It is an amenable number.

159943881 is a deficient number, since it is larger than the sum of its proper divisors (66037559).

159943881 is a wasteful number, since it uses less digits than its factorization.

159943881 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18756.

The product of its digits is 311040, while the sum is 48.

The square root of 159943881 is about 12646.8921478757. The cubic root of 159943881 is about 542.8200448959.

The spelling of 159943881 in words is "one hundred fifty-nine million, nine hundred forty-three thousand, eight hundred eighty-one".