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288230905081 = 7283307230849
BaseRepresentation
bin1000011000110111110…
…01101001010011111001
31000112222022022001121201
410030123321221103321
514210244102430311
6340224512334201
726552426161300
oct4143371512371
91015868261551
10288230905081
11101268917079
1247a3bb44361
1321245782312
14dd4406d437
15776e34e9c1
hex431be694f9

288230905081 has 24 divisors (see below), whose sum is σ = 340435418400. Its totient is φ = 243282396672.

The previous prime is 288230904931. The next prime is 288230905093. The reversal of 288230905081 is 180509032882.

It is not a de Polignac number, because 288230905081 - 233 = 279640970489 is a prime.

It is a super-2 number, since 2×2882309050812 (a number of 24 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (288230905181) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1133145 + ... + 1363993.

It is an arithmetic number, because the mean of its divisors is an integer number (14184809100).

Almost surely, 2288230905081 is an apocalyptic number.

It is an amenable number.

288230905081 is a deficient number, since it is larger than the sum of its proper divisors (52204513319).

288230905081 is a wasteful number, since it uses less digits than its factorization.

288230905081 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 231253 (or 231246 counting only the distinct ones).

The product of its (nonzero) digits is 276480, while the sum is 46.

The spelling of 288230905081 in words is "two hundred eighty-eight billion, two hundred thirty million, nine hundred five thousand, eighty-one".

Divisors: 1 7 49 83 307 581 2149 4067 15043 25481 178367 230849 1248569 1615943 11311601 19160467 70870643 134123269 496094501 938862883 3472661507 5882263369 41175843583 288230905081