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206409325 = 5217736653
BaseRepresentation
bin11000100110110…
…00111001101101
3112101101200100211
430103120321231
5410320044300
632252022421
75054310313
oct1423307155
9471350324
10206409325
11a6570421
1259161a11
13339bc6c5
141d5b00b3
15131c34ba
hexc4d8e6d

206409325 has 24 divisors (see below), whose sum is σ = 274756968. Its totient is φ = 153262080.

The previous prime is 206409319. The next prime is 206409361. The reversal of 206409325 is 523904602.

It can be written as a sum of positive squares in 12 ways, for example, as 79103236 + 127306089 = 8894^2 + 11283^2 .

It is not a de Polignac number, because 206409325 - 227 = 72191597 is a prime.

It is a Duffinian number.

It is a congruent number.

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, 27699 + ... + 34351.

It is an arithmetic number, because the mean of its divisors is an integer number (11448207).

Almost surely, 2206409325 is an apocalyptic number.

206409325 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

206409325 is a deficient number, since it is larger than the sum of its proper divisors (68347643).

206409325 is a wasteful number, since it uses less digits than its factorization.

206409325 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6753 (or 6748 counting only the distinct ones).

The product of its (nonzero) digits is 12960, while the sum is 31.

The square root of 206409325 is about 14366.9525300253. The cubic root of 206409325 is about 590.9849725575.

The spelling of 206409325 in words is "two hundred six million, four hundred nine thousand, three hundred twenty-five".

Divisors: 1 5 17 25 73 85 365 425 1241 1825 6205 6653 31025 33265 113101 166325 485669 565505 2428345 2827525 8256373 12141725 41281865 206409325