| Base | Representation |
|---|---|
| bin | 11001001101000… |
| … | …00100010011100 |
| 3 | 112201211022120000 |
| 4 | 30212200202130 |
| 5 | 413110440330 |
| 6 | 32551254300 |
| 7 | 5145023514 |
| oct | 1446404234 |
| 9 | 481738500 |
| 10 | 211421340 |
| 11 | a9383a89 |
| 12 | 5a97a390 |
| 13 | 34a55ab0 |
| 14 | 20116844 |
| 15 | 13863560 |
| hex | c9a089c |
211421340 has 120 divisors (see below), whose sum is σ = 714325920. Its totient is φ = 52036992.
The previous prime is 211421321. The next prime is 211421387. The reversal of 211421340 is 43124112.
211421340 is a `hidden beast` number, since 211 + 421 + 34 + 0 = 666.
211421340 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.
It is a Harshad number since it is a multiple of its sum of digits (18).
It is a congruent number.
It is an unprimeable number.
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 39 ways as a sum of consecutive naturals, for example, 16041 + ... + 26079.
It is an arithmetic number, because the mean of its divisors is an integer number (5952716).
Almost surely, 2211421340 is an apocalyptic number.
211421340 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 211421340, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (357162960).
211421340 is an abundant number, since it is smaller than the sum of its proper divisors (502904580).
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
211421340 is a wasteful number, since it uses less digits than its factorization.
211421340 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 10073 (or 10062 counting only the distinct ones).
The product of its (nonzero) digits is 192, while the sum is 18.
The square root of 211421340 is about 14540.3349342441. The cubic root of 211421340 is about 595.7301865668.
Adding to 211421340 its reverse (43124112), we get a palindrome (254545452).
The spelling of 211421340 in words is "two hundred eleven million, four hundred twenty-one thousand, three hundred forty".
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