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55215712914 = 2390723334349
BaseRepresentation
bin110011011011000111…
…001110101010010010
312021112002002211200020
4303123013032222102
51401040210303124
641211000204310
73663203546565
oct633307165222
9167462084606
1055215712914
112146491539a
12a84b769696
13528c4c789b
14295b3044dc
15168270b379
hexcdb1cea92

55215712914 has 32 divisors (see below), whose sum is σ = 110625998400. Its totient is φ = 18372839232.

The previous prime is 55215712913. The next prime is 55215712931. The reversal of 55215712914 is 41921751255.

It is not an unprimeable number, because it can be changed into a prime (55215712913) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 12694012 + ... + 12698360.

It is an arithmetic number, because the mean of its divisors is an integer number (3457062450).

Almost surely, 255215712914 is an apocalyptic number.

55215712914 is an abundant number, since it is smaller than the sum of its proper divisors (55410285486).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

55215712914 is a wasteful number, since it uses less digits than its factorization.

55215712914 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7594.

The product of its digits is 126000, while the sum is 42.

The spelling of 55215712914 in words is "fifty-five billion, two hundred fifteen million, seven hundred twelve thousand, nine hundred fourteen".

Divisors: 1 2 3 6 907 1814 2333 2721 4349 4666 5442 6999 8698 13047 13998 26094 2116031 3944543 4232062 6348093 7889086 10146217 11833629 12696186 20292434 23667258 30438651 60877302 9202618819 18405237638 27607856457 55215712914