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208000133 = 1175724979
BaseRepresentation
bin11000110010111…
…01010010000101
3112111101111112122
430121131102011
5411222001013
632350055325
75103654245
oct1431352205
9474344478
10208000133
11a7457640
12597aa545
1334128803
141d8a5b25
15133d9a08
hexc65d485

208000133 has 8 divisors (see below), whose sum is σ = 227218080. Its totient is φ = 188833680.

The previous prime is 208000103. The next prime is 208000139. The reversal of 208000133 is 331000802.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 208000133 - 28 = 207999877 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (208000139) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4163 + ... + 20816.

It is an arithmetic number, because the mean of its divisors is an integer number (28402260).

Almost surely, 2208000133 is an apocalyptic number.

208000133 is the 8327-th octagonal number.

It is an amenable number.

208000133 is a deficient number, since it is larger than the sum of its proper divisors (19217947).

208000133 is a wasteful number, since it uses less digits than its factorization.

208000133 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25747.

The product of its (nonzero) digits is 144, while the sum is 17.

The square root of 208000133 is about 14422.2097128006. The cubic root of 208000133 is about 592.4993399673.

Adding to 208000133 its reverse (331000802), we get a palindrome (539000935).

The spelling of 208000133 in words is "two hundred eight million, one hundred thirty-three", and thus it is an aban number.

Divisors: 1 11 757 8327 24979 274769 18909103 208000133