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208133 = 297177
BaseRepresentation
bin110010110100000101
3101120111122
4302310011
523130013
64243325
71524542
oct626405
9346448
10208133
11132412
12a0545
1373973
1455bc9
1541a08
hex32d05

208133 has 4 divisors (see below), whose sum is σ = 215340. Its totient is φ = 200928.

The previous prime is 208129. The next prime is 208139. The reversal of 208133 is 331802.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 331802 = 2165901.

It can be written as a sum of positive squares in 2 ways, for example, as 158404 + 49729 = 398^2 + 223^2 .

It is a cyclic number.

It is not a de Polignac number, because 208133 - 22 = 208129 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 (208139) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3560 + ... + 3617.

It is an arithmetic number, because the mean of its divisors is an integer number (53835).

2208133 is an apocalyptic number.

It is an amenable number.

208133 is a deficient number, since it is larger than the sum of its proper divisors (7207).

208133 is an equidigital number, since it uses as much as digits as its factorization.

208133 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7206.

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

The square root of 208133 is about 456.2159576341. The cubic root of 208133 is about 59.2625472664.

Adding to 208133 its reverse (331802), we get a palindrome (539935).

The spelling of 208133 in words is "two hundred eight thousand, one hundred thirty-three".

Divisors: 1 29 7177 208133