159027981 has 12 divisors (see below), whose sum is σ = 246655872. Its totient is φ = 90873048.

The previous prime is 159027919. The next prime is 159027997. The reversal of 159027981 is 189720951.

159027981 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 159027981 - 2¹⁰ = 159026957 is a prime.

It is a super-2 number, since 2×159027981² = 50579797481872722, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (159025981) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 540765 + ... + 541058.

It is an arithmetic number, because the mean of its divisors is an integer number (20554656).

Almost surely, 2^159027981 is an apocalyptic number.

It is an amenable number.

159027981 is a deficient number, since it is larger than the sum of its proper divisors (87627891).

159027981 is a wasteful number, since it uses less digits than its factorization.

159027981 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1081840 (or 1081833 counting only the distinct ones).

The product of its (nonzero) digits is 45360, while the sum is 42.

The square root of 159027981 is about 12610.6296829302. The cubic root of 159027981 is about 541.7819289020.

The spelling of 159027981 in words is "one hundred fifty-nine million, twenty-seven thousand, nine hundred eighty-one".