223452018 has 48 divisors (see below), whose sum is σ = 502421400. Its totient is φ = 71774304.

The previous prime is 223452007. The next prime is 223452041. The reversal of 223452018 is 810254322.

It can be written as a sum of positive squares in 4 ways, for example, as 156425049 + 67026969 = 12507^2 + 8187^2 .

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 223451982 and 223452000.

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, 438748 + ... + 439256.

Almost surely, 2^223452018 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 223452018, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (251210700).

223452018 is an abundant number, since it is smaller than the sum of its proper divisors (278969382).

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

223452018 is an equidigital number, since it uses as much as digits as its factorization.

223452018 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 604 (or 543 counting only the distinct ones).

The product of its (nonzero) digits is 3840, while the sum is 27.

The square root of 223452018 is about 14948.3115434486. The cubic root of 223452018 is about 606.8221530508.

The spelling of 223452018 in words is "two hundred twenty-three million, four hundred fifty-two thousand, eighteen".