| Base | Representation |
|---|---|
| bin | 1100010110100101101… |
| … | …1010010111100000000 |
| 3 | 202021210010102202221201 |
| 4 | 3011221123102330000 |
| 5 | 11434112333120030 |
| 6 | 241254333230544 |
| 7 | 21222030413260 |
| oct | 3055133227400 |
| 9 | 667703382851 |
| 10 | 212222160640 |
| 11 | 82003971406 |
| 12 | 35168932454 |
| 13 | 170214c99a9 |
| 14 | a3b340d7a0 |
| 15 | 57c147a2ca |
| hex | 31696d2f00 |
212222160640 has 144 divisors (see below), whose sum is σ = 593320154112. Its totient is φ = 71213617152.
The previous prime is 212222160637. The next prime is 212222160643. The reversal of 212222160640 is 46061222212.
It is an interprime number because it is at equal distance from previous prime (212222160637) and next prime (212222160643).
It is a Harshad number since it is a multiple of its sum of digits (28).
It is a junction number, because it is equal to n+sod(n) for n = 212222160599 and 212222160608.
It is a congruent number.
It is not an unprimeable number, because it can be changed into a prime (212222160643) 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 15 ways as a sum of consecutive naturals, for example, 169147 + ... + 673093.
It is an arithmetic number, because the mean of its divisors is an integer number (4120278848).
Almost surely, 2212222160640 is an apocalyptic number.
212222160640 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 212222160640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (296660077056).
212222160640 is an abundant number, since it is smaller than the sum of its proper divisors (381097993472).
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
212222160640 is an equidigital number, since it uses as much as digits as its factorization.
212222160640 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 504022 (or 504008 counting only the distinct ones).
The product of its (nonzero) digits is 4608, while the sum is 28.
Adding to 212222160640 its reverse (46061222212), we get a palindrome (258283382852).
The spelling of 212222160640 in words is "two hundred twelve billion, two hundred twenty-two million, one hundred sixty thousand, six hundred forty".
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