222222321 has 24 divisors (see below), whose sum is σ = 326514240. Its totient is φ = 145620000.

The previous prime is 222222281. The next prime is 222222367. The reversal of 222222321 is 123222222.

It is not a de Polignac number, because 222222321 - 2⁷ = 222222193 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 222222294 and 222222303.

It is not an unprimeable number, because it can be changed into a prime (222232321) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 136450 + ... + 138068.

It is an arithmetic number, because the mean of its divisors is an integer number (13604760).

Almost surely, 2^222222321 is an apocalyptic number.

It is an amenable number.

222222321 is a deficient number, since it is larger than the sum of its proper divisors (104291919).

222222321 is a wasteful number, since it uses less digits than its factorization.

222222321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1877 (or 1874 counting only the distinct ones).

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

The square root of 222222321 is about 14907.1231631056. The cubic root of 222222321 is about 605.7069540229.

Adding to 222222321 its reverse (123222222), we get a palindrome (345444543).

Subtracting from 222222321 its reverse (123222222), we obtain a palindrome (99000099).

The spelling of 222222321 in words is "two hundred twenty-two million, two hundred twenty-two thousand, three hundred twenty-one".