250 (number)
Encyclopedia : 2 : 25 : 250 : 250 (number)
250 is the natural number following 249 and preceding 251.
| |
| Cardinal | Two hundred 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 érbáiwǔ) 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:
- SMTP status code for mail action completed.
- 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.
Other numbers from 251 to 259
Two hundred 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 fifty-two 252 = 22·32·7, refactorable number, Harshad number
Two hundred fifty-three 253 = 11·23, triangular number, star number, centered heptagonal number, centered nonagonal number
Two hundred fifty-four 254 = 2·127, Mertens function returns 0, nontotient
Two hundred fifty-five has its own article.
Two hundred and fifty-six has its own article.
Two hundred fifty-seven 257 prime, Fermat prime, balanced prime, Chen prime, Eisenstein prime with no imaginary part
Two hundred fifty-eight 258 = 2·3·43, sphenic number, sum of four consecutive primes (59 + 61 + 67 + 71), nontotient
Two hundred fifty-nine 259 = 7·37, repdigit in base 6 (1111).
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