| Base | Representation |
|---|---|
| bin | 11010111000100… |
| … | …11001000101100 |
| 3 | 120201100201022211 |
| 4 | 31130103020230 |
| 5 | 430213202340 |
| 6 | 34213420204 |
| 7 | 5405623120 |
| oct | 1534231054 |
| 9 | 521321284 |
| 10 | 225522220 |
| 11 | 106335200 |
| 12 | 6363a664 |
| 13 | 37952101 |
| 14 | 21d47580 |
| 15 | 14beb5ea |
| hex | d71322c |
225522220 has 72 divisors (see below), whose sum is σ = 594976032. Its totient is φ = 70287360.
The previous prime is 225522217. The next prime is 225522247. The reversal of 225522220 is 22225522.
225522220 is digitally balanced in base 3, 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 (22).
It is a junction number, because it is equal to n+sod(n) for n = 225522191 and 225522200.
It is an unprimeable number.
It is a pernicious number, because its binary representation contains a prime number (13) of ones.
It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 10284 + ... + 23596.
It is an arithmetic number, because the mean of its divisors is an integer number (8263556).
Almost surely, 2225522220 is an apocalyptic number.
225522220 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 225522220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (297488016).
225522220 is an abundant number, since it is smaller than the sum of its proper divisors (369453812).
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
225522220 is a wasteful number, since it uses less digits than its factorization.
225522220 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 13351 (or 13338 counting only the distinct ones).
The product of its (nonzero) digits is 1600, while the sum is 22.
The square root of 225522220 is about 15017.3972445294. The cubic root of 225522220 is about 608.6903911657.
Adding to 225522220 its reverse (22225522), we get a palindrome (247747742).
The spelling of 225522220 in words is "two hundred twenty-five million, five hundred twenty-two thousand, two hundred twenty".
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