250 (number)

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250 is the natural number following 249 and preceding 251.

← 200 210 220 230 240 250 260 270 280 290 → List of numbers — Integers ← 0 100 200 300 400 500 600 700 800 900 →
Cardinal	Two hundred [and] fifty
Ordinal	250th
Factorization	$2 \cdot 5^3$
Roman numeral	CCL
Binary	11111010
Hexadecimal	FA
Hebrew

As a Mandarin slang term, 250 (二百五 pinyin èrbǎiwǔ) is an insult meaning "stupid person" or "simpleton". The expression is based on bàndiàozi (半弔子 or 半吊子). In ancient China, copper coins were grouped by stringing them together through the square holes in the center; originally 1000 was a unit of currency called a diao. Ban diao zi literally means half a diao (500 coins), which is a slang term referring to a person who is inadequate in skills or mental abilities. Since modest Chinese scholars may call themselves ban diao zi to humbly deprecate their own expertise, ban diao zi is not necessarily a pejorative term. On the other hand, Er bai wu (250) is half of a ban diao zi and it is an insult.

Two hundred [and] fifty is also:

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In the Holy Bible, the number of men rebelling against Moses, who were swallowed up by a fire. (Numbers 26:10).
The years 250 BC and AD 250.
The number of Pokémon originally available in Pokémon Gold and Silver before Celebi was added.

[edit] Other numbers from 251 to 259

Two hundred [and] fifty-one 251 prime, Sophie Germain prime, sum of three consecutive primes (79 + 83 + 89), sum of seven consecutive primes (23 + 29 + 31 + 37 + 41 + 43 + 47), Chen prime, Eisenstein prime with no imaginary part. SMTP status code for user not local, mail will be forwarded

Two hundred [and] fifty-two 252 = 2²·3²·7, refactorable number, Harshad number, central binomial coefficient (10, 5), the largest one divisible by all coefficients in the previous line, member of the Mian-Chowla sequence

Two hundred [and] fifty-three 253 = 11·23, triangular number, star number, centered heptagonal number, centered nonagonal number, Blum integer

Two hundred [and] fifty-four 254 = 2·127, Mertens function returns 0, nontotient

Two hundred [and] fifty-five has its own article.

Two hundred [and] fifty-six has its own article.

Two hundred [and] fifty-seven 257 prime, Fermat prime, balanced prime, Chen prime, Eisenstein prime with no imaginary part

Two hundred [and] fifty-eight 258 = 2·3·43, sphenic number, sum of four consecutive primes (59 + 61 + 67 + 71), nontotient

Two hundred [and] fifty-nine 259 = 7·37, repdigit in base 6 (1111).