159271976221 has 4 divisors (see below), whose sum is σ = 162975975712. Its totient is φ = 155567976732.

The previous prime is 159271976203. The next prime is 159271976257. The reversal of 159271976221 is 122679172951.

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.

It is not a de Polignac number, because 159271976221 - 2¹⁷ = 159271845149 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (159271976261) 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, 1851999681 + ... + 1851999766.

It is an arithmetic number, because the mean of its divisors is an integer number (40743993928).

Almost surely, 2^159271976221 is an apocalyptic number.

It is an amenable number.

159271976221 is a deficient number, since it is larger than the sum of its proper divisors (3703999491).

159271976221 is an equidigital number, since it uses as much as digits as its factorization.

159271976221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3703999490.

The product of its digits is 952560, while the sum is 52.

The spelling of 159271976221 in words is "one hundred fifty-nine billion, two hundred seventy-one million, nine hundred seventy-six thousand, two hundred twenty-one".