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205010208 = 253213173221
BaseRepresentation
bin11000011100000…
…11010100100000
3112021202121010200
430032003110200
5404440311313
632202025200
75036362254
oct1416032440
9467677120
10205010208
11a57a5227
12587a8200
133361c920
141d328264
1512ee8b73
hexc383520

205010208 has 144 divisors (see below), whose sum is σ = 664982136. Its totient is φ = 59351040.

The previous prime is 205010177. The next prime is 205010219. The reversal of 205010208 is 802010502.

205010208 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 187470864 + 17539344 = 13692^2 + 4188^2 .

It is a tau number, because it is divible by the number of its divisors (144).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 62038 + ... + 65258.

Almost surely, 2205010208 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 205010208, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (332491068).

205010208 is an abundant number, since it is smaller than the sum of its proper divisors (459971928).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

205010208 is a wasteful number, since it uses less digits than its factorization.

205010208 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3267 (or 3256 counting only the distinct ones).

The product of its (nonzero) digits is 160, while the sum is 18.

The square root of 205010208 is about 14318.1775376617. The cubic root of 205010208 is about 589.6466408476.

The spelling of 205010208 in words is "two hundred five million, ten thousand, two hundred eight".

Divisors: 1 2 3 4 6 8 9 12 13 16 17 18 24 26 32 34 36 39 48 51 52 68 72 78 96 102 104 117 136 144 153 156 204 208 221 234 272 288 306 312 408 416 442 468 544 612 624 663 816 884 936 1224 1248 1326 1632 1768 1872 1989 2448 2652 3221 3536 3744 3978 4896 5304 6442 7072 7956 9663 10608 12884 15912 19326 21216 25768 28989 31824 38652 41873 51536 54757 57978 63648 77304 83746 103072 109514 115956 125619 154608 164271 167492 219028 231912 251238 309216 328542 334984 376857 438056 463824 492813 502476 657084 669968 711841 753714 876112 927648 985626 1004952 1314168 1339936 1423682 1507428 1752224 1971252 2009904 2135523 2628336 2847364 3014856 3942504 4019808 4271046 5256672 5694728 6029712 6406569 7885008 8542092 11389456 12059424 12813138 15770016 17084184 22778912 25626276 34168368 51252552 68336736 102505104 205010208