3840220221 has 16 divisors (see below), whose sum is σ = 5251118400. Its totient is φ = 2495001600.

The previous prime is 3840220183. The next prime is 3840220243. The reversal of 3840220221 is 1220220483.

It is not a de Polignac number, because 3840220221 - 2¹⁴ = 3840203837 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 3840220191 and 3840220200.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3840220621) 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 15 ways as a sum of consecutive naturals, for example, 24771 + ... + 91071.

It is an arithmetic number, because the mean of its divisors is an integer number (328194900).

Almost surely, 2^3840220221 is an apocalyptic number.

It is an amenable number.

3840220221 is a deficient number, since it is larger than the sum of its proper divisors (1410898179).

3840220221 is a wasteful number, since it uses less digits than its factorization.

3840220221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 66796.

The product of its (nonzero) digits is 1536, while the sum is 24.

The square root of 3840220221 is about 61969.5104143965. The cubic root of 3840220221 is about 1565.9769911754.

The spelling of 3840220221 in words is "three billion, eight hundred forty million, two hundred twenty thousand, two hundred twenty-one".