159443881 has 8 divisors (see below), whose sum is σ = 168090624. Its totient is φ = 151016160.

The previous prime is 159443873. The next prime is 159443887. The reversal of 159443881 is 188344951.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 159443881 - 2³ = 159443873 is a prime.

It is a super-2 number, since 2×159443881² = 50844702376684322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (159443887) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 53260 + ... + 56173.

It is an arithmetic number, because the mean of its divisors is an integer number (21011328).

Almost surely, 2^159443881 is an apocalyptic number.

It is an amenable number.

159443881 is a deficient number, since it is larger than the sum of its proper divisors (8646743).

159443881 is a wasteful number, since it uses less digits than its factorization.

159443881 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 109511.

The product of its digits is 138240, while the sum is 43.

The square root of 159443881 is about 12627.1089723658. The cubic root of 159443881 is about 542.2538185193.

The spelling of 159443881 in words is "one hundred fifty-nine million, four hundred forty-three thousand, eight hundred eighty-one".