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31055450055 = 3572713971499
BaseRepresentation
bin11100111011000011…
…001000111111000111
32222011022022022122220
4130323003020333013
51002100143400210
622133334023423
72146403653500
oct347303107707
988138268586
1031055450055
1112196aa0303
1260284a7b73
132c0bc48266
1417086abba7
15c1b60ec70
hex73b0c8fc7

31055450055 has 96 divisors (see below), whose sum is σ = 58802112000. Its totient is φ = 13952252160.

The previous prime is 31055450053. The next prime is 31055450059. The reversal of 31055450055 is 55005455013.

It is not a de Polignac number, because 31055450055 - 21 = 31055450053 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 31055449998 and 31055450025.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31055450053) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 20716696 + ... + 20718194.

It is an arithmetic number, because the mean of its divisors is an integer number (612522000).

Almost surely, 231055450055 is an apocalyptic number.

31055450055 is a gapful number since it is divisible by the number (35) formed by its first and last digit.

31055450055 is a deficient number, since it is larger than the sum of its proper divisors (27746661945).

31055450055 is a wasteful number, since it uses less digits than its factorization.

31055450055 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1989 (or 1982 counting only the distinct ones).

The product of its (nonzero) digits is 37500, while the sum is 33.

The spelling of 31055450055 in words is "thirty-one billion, fifty-five million, four hundred fifty thousand, fifty-five".

Divisors: 1 3 5 7 15 21 35 49 71 105 147 213 245 355 397 497 735 1065 1191 1491 1499 1985 2485 2779 3479 4497 5955 7455 7495 8337 10437 10493 13895 17395 19453 22485 28187 31479 41685 52185 52465 58359 73451 84561 97265 106429 140935 157395 197309 220353 291795 319287 367255 422805 532145 591927 595103 745003 986545 1101765 1381163 1596435 1785309 2235009 2959635 2975515 3725015 4143489 4165721 5215021 6905815 8926545 11175045 12497163 15645063 20717445 20828605 26075105 29160047 42252313 62485815 78225315 87480141 126756939 145800235 211261565 295766191 437400705 633784695 887298573 1478830955 2070363337 4436492865 6211090011 10351816685 31055450055