| Base | Representation |
|---|---|
| bin | 111011111100000… |
| … | …1111010011010000 |
| 3 | 12012011111010212100 |
| 4 | 1313320033103100 |
| 5 | 13104333401230 |
| 6 | 531323400400 |
| 7 | 100561120341 |
| oct | 16770172320 |
| 9 | 5164433770 |
| 10 | 2011231440 |
| 11 | 942318a49 |
| 12 | 481683100 |
| 13 | 2608aa59a |
| 14 | 1511800c8 |
| 15 | bb880660 |
| hex | 77e0f4d0 |
2011231440 has 60 divisors (see below), whose sum is σ = 6754388004. Its totient is φ = 536328192.
The previous prime is 2011231433. The next prime is 2011231447. The reversal of 2011231440 is 441321102.
2011231440 is a `hidden beast` number, since 201 + 1 + 23 + 1 + 440 = 666.
It is an interprime number because it is at equal distance from previous prime (2011231433) and next prime (2011231447).
It can be written as a sum of positive squares in 2 ways, for example, as 505170576 + 1506060864 = 22476^2 + 38808^2 .
It is a tau number, because it is divible by the number of its divisors (60).
It is a Harshad number since it is a multiple of its sum of digits (18).
It is a congruent number.
It is not an unprimeable number, because it can be changed into a prime (2011231447) 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 11 ways as a sum of consecutive naturals, for example, 1395969 + ... + 1397408.
Almost surely, 22011231440 is an apocalyptic number.
2011231440 is a gapful number since it is divisible by the number (20) formed by its first and last digit.
It is an amenable number.
2011231440 is an abundant number, since it is smaller than the sum of its proper divisors (4743156564).
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
2011231440 is a wasteful number, since it uses less digits than its factorization.
2011231440 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 2793396 (or 2793387 counting only the distinct ones).
The product of its (nonzero) digits is 192, while the sum is 18.
The square root of 2011231440 is about 44846.7550665597. The cubic root of 2011231440 is about 1262.2751034229.
Adding to 2011231440 its reverse (441321102), we get a palindrome (2452552542).
The spelling of 2011231440 in words is "two billion, eleven million, two hundred thirty-one thousand, four hundred forty".
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