220000243 has 2 divisors, whose sum is σ = 220000244. Its totient is φ = 220000242.

The previous prime is 220000237. The next prime is 220000303. The reversal of 220000243 is 342000022.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 220000243 - 2¹⁷ = 219869171 is a prime.

It is not a weakly prime, because it can be changed into another prime (220000643) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110000121 + 110000122.

It is an arithmetic number, because the mean of its divisors is an integer number (110000122).

Almost surely, 2^220000243 is an apocalyptic number.

220000243 is a deficient number, since it is larger than the sum of its proper divisors (1).

220000243 is an equidigital number, since it uses as much as digits as its factorization.

220000243 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 96, while the sum is 13.

The square root of 220000243 is about 14832.4051657174. The cubic root of 220000243 is about 603.6812959441.

Adding to 220000243 its reverse (342000022), we get a palindrome (562000265).

The spelling of 220000243 in words is "two hundred twenty million, two hundred forty-three", and thus it is an aban number.