9171089221 has 16 divisors (see below), whose sum is σ = 10544598400. Its totient is φ = 7813490688.

The previous prime is 9171089171. The next prime is 9171089251. The reversal of 9171089221 is 1229801719.

It is a cyclic number.

It is not a de Polignac number, because 9171089221 - 2¹⁷ = 9170958149 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9171089251) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2171650 + ... + 2175868.

It is an arithmetic number, because the mean of its divisors is an integer number (659037400).

Almost surely, 2^9171089221 is an apocalyptic number.

It is an amenable number.

9171089221 is a deficient number, since it is larger than the sum of its proper divisors (1373509179).

9171089221 is a wasteful number, since it uses less digits than its factorization.

9171089221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6028.

The product of its (nonzero) digits is 18144, while the sum is 40.

The square root of 9171089221 is about 95765.8040273249. The cubic root of 9171089221 is about 2093.1819103526.

The spelling of 9171089221 in words is "nine billion, one hundred seventy-one million, eighty-nine thousand, two hundred twenty-one".