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200005 = 51317181
BaseRepresentation
bin110000110101000101
3101011100121
4300311011
522400010
64141541
71462051
oct606505
9334317
10200005
111272a3
12978b1
1370060
1452c61
153e3da
hex30d45

200005 has 16 divisors (see below), whose sum is σ = 275184. Its totient is φ = 138240.

The previous prime is 200003. The next prime is 200009. The reversal of 200005 is 500002.

It can be written as a sum of positive squares in 8 ways, for example, as 39204 + 160801 = 198^2 + 401^2 .

It is a sliding number, since 200005 = 5 + 200000 and 1/5 + 1/200000 = 0.200005.

It is not a de Polignac number, because 200005 - 21 = 200003 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (200003) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1015 + ... + 1195.

It is an arithmetic number, because the mean of its divisors is an integer number (17199).

2200005 is an apocalyptic number.

It is an amenable number.

200005 is a deficient number, since it is larger than the sum of its proper divisors (75179).

200005 is a wasteful number, since it uses less digits than its factorization.

200005 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 216.

The product of its (nonzero) digits is 10, while the sum is 7.

The square root of 200005 is about 447.2191856350. The cubic root of 200005 is about 58.4808420965.

Adding to 200005 its reverse (500002), we get a palindrome (700007).

It can be divided in two parts, 20000 and 5, that multiplied together give a 5-th power (100000 = 105).

The spelling of 200005 in words is "two hundred thousand, five".

Divisors: 1 5 13 17 65 85 181 221 905 1105 2353 3077 11765 15385 40001 200005