4002430221 has 24 divisors (see below), whose sum is σ = 5814319160. Its totient is φ = 2653088256.

The previous prime is 4002430163. The next prime is 4002430253. The reversal of 4002430221 is 1220342004.

4002430221 is a `hidden beast` number, since 400 + 2 + 43 + 0 + 221 = 666.

4002430221 is digitally balanced in base 2 and base 3, because in such bases it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 19053225 + 3983376996 = 4365^2 + 63114^2 .

It is not a de Polignac number, because 4002430221 - 2¹¹ = 4002428173 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 4002430194 and 4002430203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4002435221) 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, 1285815 + ... + 1288923.

Almost surely, 2^4002430221 is an apocalyptic number.

It is an amenable number.

4002430221 is a deficient number, since it is larger than the sum of its proper divisors (1811888939).

4002430221 is a wasteful number, since it uses less digits than its factorization.

4002430221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3885 (or 3882 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 18.

The square root of 4002430221 is about 63264.7628700211. The cubic root of 4002430221 is about 1587.7224648326.

Adding to 4002430221 its reverse (1220342004), we get a palindrome (5222772225).

The spelling of 4002430221 in words is "four billion, two million, four hundred thirty thousand, two hundred twenty-one".