| Base | Representation |
|---|---|
| bin | 100100000111111… |
| … | …1010011110100000 |
| 3 | 10010110211122110100 |
| 4 | 1020033322132200 |
| 5 | 4440301144412 |
| 6 | 320140102400 |
| 7 | 42015642204 |
| oct | 11017723640 |
| 9 | 3113748410 |
| 10 | 1212131232 |
| 11 | 572242154 |
| 12 | 299b34a00 |
| 13 | 164181120 |
| 14 | b6daab04 |
| 15 | 71634edc |
| hex | 483fa7a0 |
1212131232 has 144 divisors (see below), whose sum is σ = 3729293568. Its totient is φ = 371243520.
The previous prime is 1212131213. The next prime is 1212131233. The reversal of 1212131232 is 2321312121.
It is a tau number, because it is divible by the number of its divisors (144).
It is a Harshad number since it is a multiple of its sum of digits (18).
It is a nude number because it is divisible by every one of its digits and also a Zuckerman number because it is divisible by the product of its digits.
It is not an unprimeable number, because it can be changed into a prime (1212131233) by changing a digit.
It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 984057 + ... + 985287.
It is an arithmetic number, because the mean of its divisors is an integer number (25897872).
Almost surely, 21212131232 is an apocalyptic number.
1212131232 is a gapful number since it is divisible by the number (12) 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 1212131232, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1864646784).
1212131232 is an abundant number, since it is smaller than the sum of its proper divisors (2517162336).
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
1212131232 is a wasteful number, since it uses less digits than its factorization.
1212131232 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 1523 (or 1512 counting only the distinct ones).
The product of its digits is 144, while the sum is 18.
The square root of 1212131232 is about 34815.6750903957. The cubic root of 1212131232 is about 1066.2275021996.
Adding to 1212131232 its reverse (2321312121), we get a palindrome (3533443353).
The spelling of 1212131232 in words is "one billion, two hundred twelve million, one hundred thirty-one thousand, two hundred thirty-two".
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