222768643 has 2 divisors, whose sum is σ = 222768644. Its totient is φ = 222768642.

The previous prime is 222768631. The next prime is 222768727. The reversal of 222768643 is 346867222.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 222768643 - 2⁹ = 222768131 is a prime.

It is a super-2 number, since 2×222768643² = 99251736608122898, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 222768596 and 222768605.

It is not a weakly prime, because it can be changed into another prime (222768613) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 111384321 + 111384322.

It is an arithmetic number, because the mean of its divisors is an integer number (111384322).

Almost surely, 2^222768643 is an apocalyptic number.

222768643 is a deficient number, since it is larger than the sum of its proper divisors (1).

222768643 is an equidigital number, since it uses as much as digits as its factorization.

222768643 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 193536, while the sum is 40.

The square root of 222768643 is about 14925.4361075313. The cubic root of 222768643 is about 606.2029141452.

The spelling of 222768643 in words is "two hundred twenty-two million, seven hundred sixty-eight thousand, six hundred forty-three".