159630881 has 4 divisors (see below), whose sum is σ = 159734064. Its totient is φ = 159527700.

The previous prime is 159630871. The next prime is 159630883. The reversal of 159630881 is 188036951.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 188036951 = 53 ⋅3547867.

It is a cyclic number.

It is not a de Polignac number, because 159630881 - 2⁶ = 159630817 is a prime.

It is a super-2 number, since 2×159630881² = 50964036337672322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (159630883) 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 3 ways as a sum of consecutive naturals, for example, 49235 + ... + 52376.

It is an arithmetic number, because the mean of its divisors is an integer number (39933516).

Almost surely, 2^159630881 is an apocalyptic number.

It is an amenable number.

159630881 is a deficient number, since it is larger than the sum of its proper divisors (103183).

159630881 is a wasteful number, since it uses less digits than its factorization.

159630881 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 103182.

The product of its (nonzero) digits is 51840, while the sum is 41.

The square root of 159630881 is about 12634.5115061881. The cubic root of 159630881 is about 542.4657255701.

The spelling of 159630881 in words is "one hundred fifty-nine million, six hundred thirty thousand, eight hundred eighty-one".