4002433221 has 12 divisors (see below), whose sum is σ = 5401676288. Its totient is φ = 2636127144.

The previous prime is 4002433189. The next prime is 4002433241. The reversal of 4002433221 is 1223342004.

4002433221 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 4002433221 - 2⁵ = 4002433189 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 (4002433241) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 76165 + ... + 117498.

Almost surely, 2^4002433221 is an apocalyptic number.

It is an amenable number.

4002433221 is a deficient number, since it is larger than the sum of its proper divisors (1399243067).

4002433221 is an equidigital number, since it uses as much as digits as its factorization.

4002433221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 193832 (or 193749 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 21.

The square root of 4002433221 is about 63264.7865798977. The cubic root of 4002433221 is about 1587.7228615221.

Adding to 4002433221 its reverse (1223342004), we get a palindrome (5225775225).

The spelling of 4002433221 in words is "four billion, two million, four hundred thirty-three thousand, two hundred twenty-one".