222331321 has 4 divisors (see below), whose sum is σ = 235409652. Its totient is φ = 209252992.

The previous prime is 222331283. The next prime is 222331327. The reversal of 222331321 is 123133222.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 123133222 = 2 ⋅61566611.

It can be written as a sum of positive squares in 2 ways, for example, as 92371321 + 129960000 = 9611^2 + 11400^2 .

It is a cyclic number.

It is not a de Polignac number, because 222331321 - 2²¹ = 220234169 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (222331327) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6539140 + ... + 6539173.

It is an arithmetic number, because the mean of its divisors is an integer number (58852413).

Almost surely, 2^222331321 is an apocalyptic number.

It is an amenable number.

222331321 is a deficient number, since it is larger than the sum of its proper divisors (13078331).

222331321 is a wasteful number, since it uses less digits than its factorization.

222331321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13078330.

The product of its digits is 432, while the sum is 19.

The square root of 222331321 is about 14910.7786852330. The cubic root of 222331321 is about 605.8059708784.

Adding to 222331321 its reverse (123133222), we get a palindrome (345464543).

The spelling of 222331321 in words is "two hundred twenty-two million, three hundred thirty-one thousand, three hundred twenty-one".