253 (number)
253 (two hundred [and] fifty-three) is the natural number following 252 and preceding 254.
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| Cardinal | two hundred fifty-three | |||
| Ordinal | 253rd (two hundred fifty-third) | |||
| Factorization | 11 × 23 | |||
| Divisors | 1, 11, 23, 253 | |||
| Greek numeral | ΣΝΓ´ | |||
| Roman numeral | CCLIII | |||
| Binary | 111111012 | |||
| Ternary | 1001013 | |||
| Octal | 3758 | |||
| Duodecimal | 19112 | |||
| Hexadecimal | FD16 | |||
In mathematics
253 is:
- a semiprime since it is the product of 2 primes.
- a triangular number.[1]
- a star number.[2]
- a centered heptagonal number.[3]
- a centered nonagonal number.[4]
- a Blum integer.[5]
- a member of the 13-aliquot tree.
gollark: Presumably that we should be using incredibly fancy languages to make even fancier compilers.
gollark: I have no idea.
gollark: Well, that was in fact opining.
gollark: No you aren't.
gollark: Could the OpenCL of Turbokristforge not run as a CPU miner too?
References
- Sloane, N. J. A. (ed.). "Sequence A000217 (triangular numbers)". The On-Line Encyclopedia of Integer Sequences. OEIS Foundation.
- Sloane, N. J. A. (ed.). "Sequence A003154 (Centered 12-gonal numbers. Also star numbers: 6*n*(n-1) + 1)". The On-Line Encyclopedia of Integer Sequences. OEIS Foundation.
- Sloane, N. J. A. (ed.). "Sequence A069099 (Centered heptagonal numbers. a(n) = (7*n^2 - 7*n + 2)/2)". The On-Line Encyclopedia of Integer Sequences. OEIS Foundation.
- Sloane, N. J. A. (ed.). "Sequence A060544 (Centered 9-gonal numbers. (3n-1)*(3n-2)/2)". The On-Line Encyclopedia of Integer Sequences. OEIS Foundation.
- Sloane, N. J. A. (ed.). "Sequence A016105 (Blum integers: numbers of the form p * q where p and q are distinct primes congruent to 3 (mod 4))". The On-Line Encyclopedia of Integer Sequences. OEIS Foundation.
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