222523321 has 12 divisors (see below), whose sum is σ = 233421300. Its totient is φ = 212115200.

The previous prime is 222523289. The next prime is 222523331. The reversal of 222523321 is 123325222.

It can be written as a sum of positive squares in 2 ways, for example, as 213306025 + 9217296 = 14605^2 + 3036^2 .

It is not a de Polignac number, because 222523321 - 2⁵ = 222523289 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 222523292 and 222523301.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (222523331) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 211605 + ... + 212653.

It is an arithmetic number, because the mean of its divisors is an integer number (19451775).

Almost surely, 2^222523321 is an apocalyptic number.

It is an amenable number.

222523321 is a deficient number, since it is larger than the sum of its proper divisors (10897979).

222523321 is a wasteful number, since it uses less digits than its factorization.

222523321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1496 (or 1473 counting only the distinct ones).

The product of its digits is 1440, while the sum is 22.

The square root of 222523321 is about 14917.2155913897. The cubic root of 222523321 is about 605.9803072093.

Adding to 222523321 its reverse (123325222), we get a palindrome (345848543).

The spelling of 222523321 in words is "two hundred twenty-two million, five hundred twenty-three thousand, three hundred twenty-one".