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83081185 = 5114013767
BaseRepresentation
bin1001111001110…
…11011111100001
312210022221221221
410330323133201
5132232044220
612124415041
72026115125
oct474733741
9183287857
1083081185
1142996140
12239a7481
131429b985
14b069585
1574619aa
hex4f3b7e1

83081185 has 16 divisors (see below), whose sum is σ = 109060992. Its totient is φ = 60256000.

The previous prime is 83081171. The next prime is 83081213. The reversal of 83081185 is 58118038.

It is not a de Polignac number, because 83081185 - 25 = 83081153 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 83081185.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 20172 + ... + 23938.

It is an arithmetic number, because the mean of its divisors is an integer number (6816312).

Almost surely, 283081185 is an apocalyptic number.

It is an amenable number.

83081185 is a deficient number, since it is larger than the sum of its proper divisors (25979807).

83081185 is a wasteful number, since it uses less digits than its factorization.

83081185 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4184.

The product of its (nonzero) digits is 7680, while the sum is 34.

The square root of 83081185 is about 9114.8880958572. Note that the first 3 decimals coincide. The cubic root of 83081185 is about 436.3492435738.

The spelling of 83081185 in words is "eighty-three million, eighty-one thousand, one hundred eighty-five".

Divisors: 1 5 11 55 401 2005 3767 4411 18835 22055 41437 207185 1510567 7552835 16616237 83081185