243222105 has 32 divisors (see below), whose sum is σ = 445575168. Its totient is φ = 110980800.

The previous prime is 243222103. The next prime is 243222143. The reversal of 243222105 is 501222342.

It is not a de Polignac number, because 243222105 - 2¹ = 243222103 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is not an unprimeable number, because it can be changed into a prime (243222103) 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 in 31 ways as a sum of consecutive naturals, for example, 64420 + ... + 68090.

It is an arithmetic number, because the mean of its divisors is an integer number (13924224).

Almost surely, 2^243222105 is an apocalyptic number.

It is an amenable number.

243222105 is a deficient number, since it is larger than the sum of its proper divisors (202353063).

243222105 is a wasteful number, since it uses less digits than its factorization.

243222105 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4317.

The product of its (nonzero) digits is 960, while the sum is 21.

The square root of 243222105 is about 15595.5796621992. The cubic root of 243222105 is about 624.2152112497.

Adding to 243222105 its reverse (501222342), we get a palindrome (744444447).

The spelling of 243222105 in words is "two hundred forty-three million, two hundred twenty-two thousand, one hundred five".