| Base | Representation |
|---|---|
| bin | 11001011010110… |
| … | …00011110011000 |
| 3 | 112212012212102000 |
| 4 | 30231120132120 |
| 5 | 414041121240 |
| 6 | 33054041000 |
| 7 | 5166240222 |
| oct | 1455303630 |
| 9 | 485185360 |
| 10 | 213223320 |
| 11 | aa3a4922 |
| 12 | 5b4a9160 |
| 13 | 3523705b |
| 14 | 20465412 |
| 15 | 13abc430 |
| hex | cb58798 |
213223320 has 128 divisors (see below), whose sum is σ = 748224000. Its totient is φ = 53861760.
The previous prime is 213223313. The next prime is 213223343. The reversal of 213223320 is 23322312.
It is a happy number.
213223320 is a `hidden beast` number, since 21 + 322 + 3 + 320 = 666.
213223320 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.
It is a Harshad number since it is a multiple of its sum of digits (18).
It is a junction number, because it is equal to n+sod(n) for n = 213223293 and 213223302.
It is a congruent number.
It is an unprimeable number.
It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 15325 + ... + 25715.
It is an arithmetic number, because the mean of its divisors is an integer number (5845500).
Almost surely, 2213223320 is an apocalyptic number.
213223320 is a gapful number since it is divisible by the number (20) formed by its first and last digit.
It is an amenable number.
It is a practical number, because each smaller number is the sum of distinct divisors of 213223320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (374112000).
213223320 is an abundant number, since it is smaller than the sum of its proper divisors (535000680).
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
213223320 is a wasteful number, since it uses less digits than its factorization.
213223320 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 10430 (or 10420 counting only the distinct ones).
The product of its (nonzero) digits is 432, while the sum is 18.
The square root of 213223320 is about 14602.1683321348. The cubic root of 213223320 is about 597.4179039065.
Adding to 213223320 its reverse (23322312), we get a palindrome (236545632).
It can be divided in two parts, 21322 and 3320, that added together give a palindrome (24642).
The spelling of 213223320 in words is "two hundred thirteen million, two hundred twenty-three thousand, three hundred twenty".
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