Prime number 21991

Representations of 21991
Greek numeral
βMα͵αϡϟαʹ
Arabic numeral
٢١٩٩١
Roman numeral
XXMCMXCI
Maya numeral
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Chinese numeral
二万一千九百九十一
Hebrew numeral
כא׳ תתקצא
21991 in different numeral systems
Binary
101010111100111
Base-3
1010011111
Base-4
11113213
Base-5
1200431
Base-6
245451
Base-7
121054
Base-8
52747
Duodecimal
10887
Hex
55e7
Vigesimal
2ejb
Base-24
1e47
Base-36
gyv
Negabinary
11010101000111011
Characteristics
Difference of 2 squares Odd Prime number Gaussian prime Deficient
Related primes
Prime number before 21991
21977
Prime number after 21991
21997