| Base | Representation |
|---|---|
| bin | 100100001010000… |
| … | …0111100100100100 |
| 3 | 10010112220122102000 |
| 4 | 1020110013210210 |
| 5 | 4441041432234 |
| 6 | 320215445300 |
| 7 | 42031212513 |
| oct | 11024074444 |
| 9 | 3115818360 |
| 10 | 1213233444 |
| 11 | 572925275 |
| 12 | 29a386830 |
| 13 | 164478a17 |
| 14 | b71b667a |
| 15 | 717a1899 |
| hex | 48507924 |
1213233444 has 96 divisors (see below), whose sum is σ = 3279830400. Its totient is φ = 387354240.
The previous prime is 1213233443. The next prime is 1213233451. The reversal of 1213233444 is 4443323121.
1213233444 is a `hidden beast` number, since 1 + 213 + 2 + 3 + 3 + 444 = 666.
It is a super-2 number, since 2×12132334442 = 2943870779280202272, which contains 22 as substring.
It is a Harshad number since it is a multiple of its sum of digits (27).
It is a nude number because it is divisible by every one of its digits.
It is not an unprimeable number, because it can be changed into a prime (1213233443) by changing a digit.
It is a pernicious number, because its binary representation contains a prime number (11) of ones.
It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 408814 + ... + 411770.
It is an arithmetic number, because the mean of its divisors is an integer number (34164900).
Almost surely, 21213233444 is an apocalyptic number.
It is an amenable number.
It is a practical number, because each smaller number is the sum of distinct divisors of 1213233444, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1639915200).
1213233444 is an abundant number, since it is smaller than the sum of its proper divisors (2066596956).
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
1213233444 is a wasteful number, since it uses less digits than its factorization.
1213233444 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 3130 (or 3122 counting only the distinct ones).
The product of its digits is 6912, while the sum is 27.
The square root of 1213233444 is about 34831.5007428621. The cubic root of 1213233444 is about 1066.5505840255.
Adding to 1213233444 its reverse (4443323121), we get a palindrome (5656556565).
The spelling of 1213233444 in words is "one billion, two hundred thirteen million, two hundred thirty-three thousand, four hundred forty-four".
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