159621871 has 4 divisors (see below), whose sum is σ = 160032600. Its totient is φ = 159211144.

The previous prime is 159621853. The next prime is 159621877. The reversal of 159621871 is 178126951.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 178126951 = 11587 ⋅15373.

It is a cyclic number.

It is not a de Polignac number, because 159621871 - 2⁹ = 159621359 is a prime.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (159621877) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 204781 + ... + 205558.

It is an arithmetic number, because the mean of its divisors is an integer number (40008150).

Almost surely, 2^159621871 is an apocalyptic number.

159621871 is a deficient number, since it is larger than the sum of its proper divisors (410729).

159621871 is an equidigital number, since it uses as much as digits as its factorization.

159621871 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 410728.

The product of its digits is 30240, while the sum is 40.

The square root of 159621871 is about 12634.1549381033. The cubic root of 159621871 is about 542.4555192989.

The spelling of 159621871 in words is "one hundred fifty-nine million, six hundred twenty-one thousand, eight hundred seventy-one".