221043222 has 32 divisors (see below), whose sum is σ = 492156000. Its totient is φ = 73538784.

The previous prime is 221043181. The next prime is 221043223. The reversal of 221043222 is 222340122.

221043222 is a `hidden beast` number, since 2 + 210 + 432 + 22 = 666.

221043222 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 = 221043195 and 221043204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221043223) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 26404 + ... + 33752.

It is an arithmetic number, because the mean of its divisors is an integer number (15379875).

Almost surely, 2^221043222 is an apocalyptic number.

221043222 is an abundant number, since it is smaller than the sum of its proper divisors (271112778).

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

221043222 is a wasteful number, since it uses less digits than its factorization.

221043222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7917 (or 7911 counting only the distinct ones).

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

The square root of 221043222 is about 14867.5223894232. The cubic root of 221043222 is about 604.6337714776.

Adding to 221043222 its reverse (222340122), we get a palindrome (443383344).

The spelling of 221043222 in words is "two hundred twenty-one million, forty-three thousand, two hundred twenty-two".