4032221220 has 36 divisors (see below), whose sum is σ = 12231071580. Its totient is φ = 1075258944.

The previous prime is 4032221213. The next prime is 4032221299. The reversal of 4032221220 is 221222304.

4032221220 is a `hidden beast` number, since 403 + 22 + 21 + 220 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 611375076 + 3420846144 = 24726^2 + 58488^2 .

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 4032221193 and 4032221202.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 11200435 + ... + 11200794.

Almost surely, 2^4032221220 is an apocalyptic number.

It is an amenable number.

4032221220 is an abundant number, since it is smaller than the sum of its proper divisors (8198850360).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

4032221220 is a wasteful number, since it uses less digits than its factorization.

4032221220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22401244 (or 22401239 counting only the distinct ones).

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

The square root of 4032221220 is about 63499.7733854224. The cubic root of 4032221220 is about 1591.6519913245.

Adding to 4032221220 its reverse (221222304), we get a palindrome (4253443524).

The spelling of 4032221220 in words is "four billion, thirty-two million, two hundred twenty-one thousand, two hundred twenty".