243223266 has 64 divisors (see below), whose sum is σ = 580156416. Its totient is φ = 67003200.

The previous prime is 243223259. The next prime is 243223271. The reversal of 243223266 is 662322342.

It is a Curzon number.

It is an unprimeable number.

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, 55371 + ... + 59601.

It is an arithmetic number, because the mean of its divisors is an integer number (9064944).

Almost surely, 2^243223266 is an apocalyptic number.

243223266 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 243223266, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (290078208).

243223266 is an abundant number, since it is smaller than the sum of its proper divisors (336933150).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

243223266 is a wasteful number, since it uses less digits than its factorization.

243223266 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4327.

The product of its digits is 20736, while the sum is 30.

The square root of 243223266 is about 15595.6168842403. The cubic root of 243223266 is about 624.2162044608.

The spelling of 243223266 in words is "two hundred forty-three million, two hundred twenty-three thousand, two hundred sixty-six".