9221809905 has 336 divisors, whose sum is σ = 21770461440. Its totient is φ = 3664362240.

The previous prime is 9221809901. The next prime is 9221809907. The reversal of 9221809905 is 5099081229.

9221809905 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 9221809905 - 2² = 9221809901 is a prime.

It is a super-2 number, since 2×9221809905² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is not an unprimeable number, because it can be changed into a prime (9221809901) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 335 ways as a sum of consecutive naturals, for example, 89532084 + ... + 89532186.

It is an arithmetic number, because the mean of its divisors is an integer number (64793040).

Almost surely, 2^9221809905 is an apocalyptic number.

It is an amenable number.

9221809905 is an abundant number, since it is smaller than the sum of its proper divisors (12548651535).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

9221809905 is a wasteful number, since it uses less digits than its factorization.

9221809905 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 184 (or 158 counting only the distinct ones).

The product of its (nonzero) digits is 116640, while the sum is 45.

The square root of 9221809905 is about 96030.2551543002. The cubic root of 9221809905 is about 2097.0335974281.

The spelling of 9221809905 in words is "nine billion, two hundred twenty-one million, eight hundred nine thousand, nine hundred five".