222643 has 2 divisors, whose sum is σ = 222644. Its totient is φ = 222642.

The previous prime is 222619. The next prime is 222647. The reversal of 222643 is 346222.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 222643 - 2¹³ = 214451 is a prime.

222643 is a lucky number.

It is a self number, because there is not a number n which added to its sum of digits gives 222643.

It is not a weakly prime, because it can be changed into another prime (222647) 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 as a sum of consecutive naturals, namely, 111321 + 111322.

It is an arithmetic number, because the mean of its divisors is an integer number (111322).

2²²²⁶⁴³ is an apocalyptic number.

222643 is a deficient number, since it is larger than the sum of its proper divisors (1).

222643 is an equidigital number, since it uses as much as digits as its factorization.

222643 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 576, while the sum is 19.

The square root of 222643 is about 471.8506119526. The cubic root of 222643 is about 60.6088925217.

Adding to 222643 its reverse (346222), we get a palindrome (568865).

The spelling of 222643 in words is "two hundred twenty-two thousand, six hundred forty-three".