Number 21981

Representations of 21981
Greek numeral
β
Μ
͵αϡπαʹ
Sanskrit numeral
२१९८१
Arabic numeral
٢١٩٨١
Roman numeral
XXMCMLXXXI
Maya numeral
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Chinese numeral
二万一千九百八十一
Hebrew numeral
כא׳ תתקפא
21981 in different numeral systems
Binary
101010111011101
Base-3
1010011010
Base-4
11113131
Base-5
1200411
Base-6
245433
Base-7
121041
Base-8
52735
Duodecimal
10879
Hex
55dd
Vigesimal
2ej1
Base-24
1e3l
Base-36
gyl
Negabinary
11010101000101101
Factorization
Prime factors
3, 17, 431
Divisors
1, 3, 17, 51, 431, 1293, 7327, 21981
Sum of divisors other than 21981
9123
Product of prime factors
21981 = 3 x 17 x 431
Characteristics
Difference of 2 squares Odd Composite Deficient
Related primes
Prime number before 21981
21977
Prime number after 21981
21991