| Base | Representation |
|---|---|
| bin | 1100011011111011010… |
| … | …1111111010001110000 |
| 3 | 202102110222222210200200 |
| 4 | 3012332311333101300 |
| 5 | 12000031214040420 |
| 6 | 242052444515200 |
| 7 | 21302401263000 |
| oct | 3067665772160 |
| 9 | 672428883620 |
| 10 | 213655221360 |
| 11 | 82679891109 |
| 12 | 354a884bb00 |
| 13 | 171bc382609 |
| 14 | a4ab88a000 |
| 15 | 58571a0b90 |
| hex | 31bed7f470 |
213655221360 has 480 divisors, whose sum is σ = 857213884800. Its totient is φ = 47642112000.
The previous prime is 213655221253. The next prime is 213655221389. The reversal of 213655221360 is 63122556312.
213655221360 is a `hidden beast` number, since 2 + 1 + 3 + 65 + 522 + 13 + 60 = 666.
It is a super-3 number, since 3×2136552213603 (a number of 35 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.
It is a Harshad number since it is a multiple of its sum of digits (36).
It is a congruent number.
It is an unprimeable number.
It is a pernicious number, because its binary representation contains a prime number (23) of ones.
It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 10114810 + ... + 10135910.
It is an arithmetic number, because the mean of its divisors is an integer number (1785862260).
Almost surely, 2213655221360 is an apocalyptic number.
213655221360 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 213655221360, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (428606942400).
213655221360 is an abundant number, since it is smaller than the sum of its proper divisors (643558663440).
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
213655221360 is a wasteful number, since it uses less digits than its factorization.
213655221360 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 21182 (or 21159 counting only the distinct ones).
The product of its (nonzero) digits is 64800, while the sum is 36.
Adding to 213655221360 its reverse (63122556312), we get a palindrome (276777777672).
The spelling of 213655221360 in words is "two hundred thirteen billion, six hundred fifty-five million, two hundred twenty-one thousand, three hundred sixty".
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