| Base | Representation |
|---|---|
| bin | 1100110111011001101… |
| … | …1011100000101100000 |
| 3 | 210010111222101101120000 |
| 4 | 3031312123130011200 |
| 5 | 12110132220032022 |
| 6 | 245312341020000 |
| 7 | 21653223003621 |
| oct | 3156633340540 |
| 9 | 703458341500 |
| 10 | 221030236512 |
| 11 | 85813896158 |
| 12 | 36a066b4600 |
| 13 | 17ac628c7c7 |
| 14 | a9ab145a48 |
| 15 | 5b398956ac |
| hex | 33766dc160 |
221030236512 has 240 divisors, whose sum is σ = 671058788400. Its totient is φ = 71315500032.
The previous prime is 221030236487. The next prime is 221030236519. The reversal of 221030236512 is 215632030122.
It is a happy number.
221030236512 is a `hidden beast` number, since 2 + 2 + 1 + 0 + 3 + 0 + 2 + 3 + 651 + 2 = 666.
221030236512 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.
It is a super-2 number, since 2×2210302365122 (a number of 23 digits) contains 22 as substring.
It is a Harshad number since it is a multiple of its sum of digits (27).
It is a congruent number.
It is not an unprimeable number, because it can be changed into a prime (221030236519) by changing a digit.
It is a pernicious number, because its binary representation contains a prime number (19) of ones.
It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 18887239 + ... + 18898937.
It is an arithmetic number, because the mean of its divisors is an integer number (2796078285).
Almost surely, 2221030236512 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 221030236512, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (335529394200).
221030236512 is an abundant number, since it is smaller than the sum of its proper divisors (450028551888).
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
221030236512 is a wasteful number, since it uses less digits than its factorization.
221030236512 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 11955 (or 11938 counting only the distinct ones).
The product of its (nonzero) digits is 4320, while the sum is 27.
Adding to 221030236512 its reverse (215632030122), we get a palindrome (436662266634).
The spelling of 221030236512 in words is "two hundred twenty-one billion, thirty million, two hundred thirty-six thousand, five hundred twelve".
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