181221320007

Names of 181221320007

• Cardinal: 181221320007 can be written as One hundred eighty-one billion, two hundred twenty-one million, three hundred twenty thousand and seven.

Scientific notation

• Scientific notation: 1.81221320007 × 10¹¹

Factors of 181221320007

• Number of distinct prime factors ω(n): 5
• Total number of prime factors Ω(n): 11
• Sum of prime factors: 187

Divisors of 181221320007

• Number of divisors d(n): 216
• Complete list of divisors:
  1 3 7 9 13 21 27 39 63 67 81 91 97 117 169 189 201 243 273 291 351 469 507 567 603 679 819 871 873 1053 1183 1261 1407 1521 1701 1809 2037 2457 2613 2619 3159 3549 3783 4221 4563 5427 6097 6111 6499 7371 7839 7857 8827 9409 10647 11323 11349 12663 13689 16281 16393 18291 18333 19497 22113 23517 23571 26481 28227 31941 33969 34047 37989 41067 45493 49179 54873 54999 58491 65863 70551 79261 79443 84487 84681 95823 101907 102141 113967 114751 122317 136479 147537 164619 164997 175473 197589 211653 237783 238329 253461 254043 287469 305721 306423 344253 366951 409437 442611 493857 526419 591409 592767 630403 713349 714987 760383 762129 856219 917163 1032759 1098331 1100853 1228311 1327833 1481571 1579257 1590121 1774227 1778301 1891209 2140047 2144961 2281149 2286387 2568657 2751489 3098277 3294993 3302559 3684933 3983499 4412821 4770363 5322681 5334903 5673627 6420141 6843447 7688317 7705971 8195239 9294831 9884979 9907677 11054799 11130847 13238463 14311089 15968043 16004709 17020881 19260423 20530341 23064951 23117913 24585717 27884493 29654937 29723031 33392541 39715389 42933267 47904129 51062643 57366673 69194853 69353739 73757151 88964811 100177623 106538107 119146167 128799801 143712387 153187929 172100019 207584559 208061217 221271453 266894433 300532869 319614321 357438501 386399403 516300057 622753677 663814359 745766749 901598607 958842963 1072315503 1548900171 1868261031 1991443077 2237300247 2704795821 2876528889 4646700513 6711900741 8629586667 13940101539 20135702223 25888760001 60407106669 181221320007
• Sum of all divisors σ(n): 344504474496
• Sum of proper divisors (its aliquot sum) s(n): 163283154489
• 181221320007 is a deficient number, because the sum of its proper divisors (163283154489) is less than itself. Its deficiency is 17938165518

Bases of 181221320007

• Binary: 10101000110001101000011110010101000111₂
• Hexadecimal: 0x2A31A1E547
• Base-36: 2B92HTFR

Squares and roots of 181221320007

• 181221320007 squared (181221320007²) is 32841166825079498480049
• 181221320007 cubed (181221320007³) is 5951519602611003987268029934040343
• The square root of 181221320007 is 425700.9748720339
• The cube root of 181221320007 is 5658.9574676611

Scales and comparisons

• 181,221,320,007 seconds is equal to 5,762 years, 14 weeks, 2 days, 23 hours, 33 minutes, 27 seconds.
• To count from 1 to 181,221,320,007 would take you about eleven thousand, five hundred twenty-four years!

  This is a very rough estimate, based on a speaking rate of half a second every third order of magnitude. If you speak quickly, you could probably say any randomly-chosen number between one and a thousand in around half a second. Very big numbers obviously take longer to say, so we add half a second for every extra x1000. (We do not count involuntary pauses, bathroom breaks or the necessity of sleep in our calculation!)

• A cube with a volume of 181221320007 cubic inches would be around 471.6 feet tall.

Recreational maths with 181221320007

• 181221320007 backwards is 700023122181
• 181221320007 is a Harshad number.
• The number of decimal digits it has is: 12
• The sum of 181221320007's digits is 27
• More coming soon!