222216623 has 2 divisors, whose sum is σ = 222216624. Its totient is φ = 222216622.

The previous prime is 222216607. The next prime is 222216661. The reversal of 222216623 is 326612222.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 222216623 - 2⁴ = 222216607 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 222216592 and 222216601.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (222216223) 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 as a sum of consecutive naturals, namely, 111108311 + 111108312.

It is an arithmetic number, because the mean of its divisors is an integer number (111108312).

Almost surely, 2^222216623 is an apocalyptic number.

222216623 is a deficient number, since it is larger than the sum of its proper divisors (1).

222216623 is an equidigital number, since it uses as much as digits as its factorization.

222216623 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3456, while the sum is 26.

The square root of 222216623 is about 14906.9320451929. The cubic root of 222216623 is about 605.7017770037.

Adding to 222216623 its reverse (326612222), we get a palindrome (548828845).

The spelling of 222216623 in words is "two hundred twenty-two million, two hundred sixteen thousand, six hundred twenty-three".