221144322 has 32 divisors (see below), whose sum is σ = 508032000. Its totient is φ = 62864208.

The previous prime is 221144321. The next prime is 221144369. The reversal of 221144322 is 223441122.

221144322 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×221144322² = 97809622305679368, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is not an unprimeable number, because it can be changed into a prime (221144321) 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, 4872 + ... + 21587.

It is an arithmetic number, because the mean of its divisors is an integer number (15876000).

Almost surely, 2^221144322 is an apocalyptic number.

221144322 is an abundant number, since it is smaller than the sum of its proper divisors (286887678).

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

221144322 is a wasteful number, since it uses less digits than its factorization.

221144322 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26670.

The product of its digits is 768, while the sum is 21.

The square root of 221144322 is about 14870.9220292489. The cubic root of 221144322 is about 604.7259392092.

Adding to 221144322 its reverse (223441122), we get a palindrome (444585444).

The spelling of 221144322 in words is "two hundred twenty-one million, one hundred forty-four thousand, three hundred twenty-two".