222745669 has 2 divisors, whose sum is σ = 222745670. Its totient is φ = 222745668.

The previous prime is 222745619. The next prime is 222745727. The reversal of 222745669 is 966547222.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 222397569 + 348100 = 14913^2 + 590^2 .

It is a cyclic number.

It is not a de Polignac number, because 222745669 - 2⁹ = 222745157 is a prime.

It is a super-2 number, since 2×222745669² = 99231266116515122, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (222745619) 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, 111372834 + 111372835.

It is an arithmetic number, because the mean of its divisors is an integer number (111372835).

Almost surely, 2^222745669 is an apocalyptic number.

It is an amenable number.

222745669 is a deficient number, since it is larger than the sum of its proper divisors (1).

222745669 is an equidigital number, since it uses as much as digits as its factorization.

222745669 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 362880, while the sum is 43.

The square root of 222745669 is about 14924.6664619348. Note that the first 3 decimals coincide. The cubic root of 222745669 is about 606.1820743113.

The spelling of 222745669 in words is "two hundred twenty-two million, seven hundred forty-five thousand, six hundred sixty-nine".