| Base | Representation |
|---|---|
| bin | 10100101101000101… |
| … | …010101110011010100 |
| 3 | 2010101022221112122100 |
| 4 | 110231011111303110 |
| 5 | 331012142224340 |
| 6 | 14113552002100 |
| 7 | 1414624114611 |
| oct | 245505256324 |
| 9 | 63338845570 |
| 10 | 22231211220 |
| 11 | 9478a37039 |
| 12 | 4385230330 |
| 13 | 2133a1666a |
| 14 | 110c769508 |
| 15 | 8a1aa0830 |
| hex | 52d155cd4 |
22231211220 has 144 divisors (see below), whose sum is σ = 68501264832. Its totient is φ = 5834903040.
The previous prime is 22231211159. The next prime is 22231211227. The reversal of 22231211220 is 2211213222.
22231211220 is a `hidden beast` number, since 2 + 2 + 231 + 211 + 220 = 666.
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 = 22231211193 and 22231211202.
It is a congruent number.
It is not an unprimeable number, because it can be changed into a prime (22231211227) by changing a digit.
It is a pernicious number, because its binary representation contains a prime number (17) of ones.
It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 7501459 + ... + 7504421.
It is an arithmetic number, because the mean of its divisors is an integer number (475703228).
Almost surely, 222231211220 is an apocalyptic number.
22231211220 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 22231211220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (34250632416).
22231211220 is an abundant number, since it is smaller than the sum of its proper divisors (46270053612).
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
22231211220 is a wasteful number, since it uses less digits than its factorization.
22231211220 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 3622 (or 3617 counting only the distinct ones).
The product of its (nonzero) digits is 192, while the sum is 18.
Adding to 22231211220 its reverse (2211213222), we get a palindrome (24442424442).
The spelling of 22231211220 in words is "twenty-two billion, two hundred thirty-one million, two hundred eleven thousand, two hundred twenty".
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