Number 1981

Representations of 1981
Greek numeral
͵αϡπαʹ
Arabic numeral
١٩٨١
Roman numeral
MCMLXXXI
Maya numeral
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Chinese numeral
一千九百八十一
Hebrew numeral
א׳ תתקפא
1981 in different numeral systems
Binary
11110111101
Base-3
2201101
Base-4
132331
Base-5
30411
Base-6
13101
Base-7
5530
Base-8
3675
Hex
7bd
Base-24
3ad
Base-36
1j1
Factorization
Prime factors
7, 283
Divisors
1, 7, 283, 1981
Sum of divisors other than 1981
291
Product of prime factors
1981 = 7 x 283
Characteristics
Odd Composite
Related primes
Number 1981 prime
17203
Prime number before 1981
1979
Prime number after 1981
1987