8371192221 has 24 divisors (see below), whose sum is σ = 13860152384. Its totient is φ = 4769331840.

The previous prime is 8371192213. The next prime is 8371192259. The reversal of 8371192221 is 1222911738.

It is not a de Polignac number, because 8371192221 - 2³ = 8371192213 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 (8371192421) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 175915 + ... + 218376.

Almost surely, 2^8371192221 is an apocalyptic number.

It is an amenable number.

8371192221 is a deficient number, since it is larger than the sum of its proper divisors (5488960163).

8371192221 is a wasteful number, since it uses less digits than its factorization.

8371192221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 394641 (or 394638 counting only the distinct ones).

The product of its digits is 12096, while the sum is 36.

The square root of 8371192221 is about 91494.2196043007. The cubic root of 8371192221 is about 2030.4662328696.

The spelling of 8371192221 in words is "eight billion, three hundred seventy-one million, one hundred ninety-two thousand, two hundred twenty-one".