9000221 has 4 divisors (see below), whose sum is σ = 9027744. Its totient is φ = 8972700.

The previous prime is 9000217. The next prime is 9000223. The reversal of 9000221 is 1220009.

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 a cyclic number.

It is not a de Polignac number, because 9000221 - 2² = 9000217 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 9000196 and 9000205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9000223) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13265 + ... + 13926.

It is an arithmetic number, because the mean of its divisors is an integer number (2256936).

Almost surely, 2^9000221 is an apocalyptic number.

It is an amenable number.

9000221 is a deficient number, since it is larger than the sum of its proper divisors (27523).

9000221 is a wasteful number, since it uses less digits than its factorization.

9000221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27522.

The product of its (nonzero) digits is 36, while the sum is 14.

The square root of 9000221 is about 3000.0368331072. The cubic root of 9000221 is about 208.0100848784.

The spelling of 9000221 in words is "nine million, two hundred twenty-one", and thus it is an aban number.