223212330 has 144 divisors (see below), whose sum is σ = 647337600. Its totient is φ = 53317440.

The previous prime is 223212313. The next prime is 223212331. The reversal of 223212330 is 33212322.

It is a happy number.

It is a super-3 number, since 3×223212330³ (a number of 26 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (223212331) by changing a digit.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 1121571 + ... + 1121769.

It is an arithmetic number, because the mean of its divisors is an integer number (4495400).

Almost surely, 2^223212330 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 223212330, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (323668800).

223212330 is an abundant number, since it is smaller than the sum of its proper divisors (424125270).

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

223212330 is a wasteful number, since it uses less digits than its factorization.

223212330 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 337 (or 323 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 18.

The square root of 223212330 is about 14940.2921658179. The cubic root of 223212330 is about 606.6051041799.

Adding to 223212330 its reverse (33212322), we get a palindrome (256424652).

The spelling of 223212330 in words is "two hundred twenty-three million, two hundred twelve thousand, three hundred thirty".