223287066 has 48 divisors (see below), whose sum is σ = 512726760. Its totient is φ = 70103040.

The previous prime is 223287047. The next prime is 223287073. The reversal of 223287066 is 660782322.

It can be written as a sum of positive squares in 4 ways, for example, as 154480041 + 68807025 = 12429^2 + 8295^2 .

It is a super-3 number, since 3×223287066³ (a number of 26 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 223287066.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 16186 + ... + 26618.

Almost surely, 2^223287066 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 223287066, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (256363380).

223287066 is an abundant number, since it is smaller than the sum of its proper divisors (289439694).

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

223287066 is a wasteful number, since it uses less digits than its factorization.

223287066 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10511 (or 10508 counting only the distinct ones).

The product of its (nonzero) digits is 48384, while the sum is 36.

The square root of 223287066 is about 14942.7931124004. The cubic root of 223287066 is about 606.6727978422.

It can be divided in two parts, 2232 and 87066, that added together give a palindrome (89298).

The spelling of 223287066 in words is "two hundred twenty-three million, two hundred eighty-seven thousand, sixty-six".