8908168221 has 12 divisors (see below), whose sum is σ = 13544583520. Its totient is φ = 5626211400.

The previous prime is 8908168193. The next prime is 8908168231. The reversal of 8908168221 is 1228618098.

It is a happy number.

It is not a de Polignac number, because 8908168221 - 2¹³ = 8908160029 is a prime.

It is a super-2 number, since 2×8908168221² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8908168231) 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 11 ways as a sum of consecutive naturals, for example, 26047105 + ... + 26047446.

Almost surely, 2^8908168221 is an apocalyptic number.

It is an amenable number.

8908168221 is a deficient number, since it is larger than the sum of its proper divisors (4636415299).

8908168221 is a wasteful number, since it uses less digits than its factorization.

8908168221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 52094576 (or 52094573 counting only the distinct ones).

The product of its (nonzero) digits is 110592, while the sum is 45.

The square root of 8908168221 is about 94383.0928768495. The cubic root of 8908168221 is about 2072.9848900391.

The spelling of 8908168221 in words is "eight billion, nine hundred eight million, one hundred sixty-eight thousand, two hundred twenty-one".