159957081 has 6 divisors (see below), whose sum is σ = 231049130. Its totient is φ = 106638048.

The previous prime is 159957059. The next prime is 159957101. The reversal of 159957081 is 180759951.

159957081 is a `hidden beast` number, since 1 + 599 + 57 + 0 + 8 + 1 = 666.

It can be written as a sum of positive squares in only one way, i.e., 104960025 + 54997056 = 10245^2 + 7416^2 .

It is not a de Polignac number, because 159957081 - 2⁹ = 159956569 is a prime.

It is a super-2 number, since 2×159957081² = 51172535524081122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (159957001) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 8886496 + ... + 8886513.

Almost surely, 2^159957081 is an apocalyptic number.

It is an amenable number.

159957081 is a deficient number, since it is larger than the sum of its proper divisors (71092049).

159957081 is a wasteful number, since it uses less digits than its factorization.

159957081 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17773015 (or 17773012 counting only the distinct ones).

The product of its (nonzero) digits is 113400, while the sum is 45.

The square root of 159957081 is about 12647.4140044517. The cubic root of 159957081 is about 542.8349772740.

The spelling of 159957081 in words is "one hundred fifty-nine million, nine hundred fifty-seven thousand, eighty-one".