9004203221 has 24 divisors (see below), whose sum is σ = 10418724360. Its totient is φ = 7750619136.

The previous prime is 9004203209. The next prime is 9004203253. The reversal of 9004203221 is 1223024009.

It can be written as a sum of positive squares in 12 ways, for example, as 676728196 + 8327475025 = 26014^2 + 91255^2 .

It is not a de Polignac number, because 9004203221 - 2²⁶ = 8937094357 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 (9004203281) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 298781 + ... + 327533.

It is an arithmetic number, because the mean of its divisors is an integer number (434113515).

Almost surely, 2^9004203221 is an apocalyptic number.

It is an amenable number.

9004203221 is a deficient number, since it is larger than the sum of its proper divisors (1414521139).

9004203221 is a wasteful number, since it uses less digits than its factorization.

9004203221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28905 (or 28892 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 23.

The square root of 9004203221 is about 94890.4801389476. The cubic root of 9004203221 is about 2080.4075893958.

The spelling of 9004203221 in words is "nine billion, four million, two hundred three thousand, two hundred twenty-one".