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80205 = 355347
BaseRepresentation
bin10011100101001101
311002000120
4103211031
510031310
61415153
7452556
oct234515
9132016
1080205
1155294
123a4b9
132a678
142132d
1518b70
hex1394d

80205 has 8 divisors (see below), whose sum is σ = 128352. Its totient is φ = 42768.

The previous prime is 80191. The next prime is 80207. The reversal of 80205 is 50208.

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

It is not a de Polignac number, because 80205 - 25 = 80173 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (15), and also a Moran number because the ratio is a prime number: 5347 = 80205 / (8 + 0 + 2 + 0 + 5).

It is an Ulam number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (80207) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2659 + ... + 2688.

It is an arithmetic number, because the mean of its divisors is an integer number (16044).

280205 is an apocalyptic number.

It is an amenable number.

80205 is a deficient number, since it is larger than the sum of its proper divisors (48147).

80205 is a wasteful number, since it uses less digits than its factorization.

80205 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5355.

The product of its (nonzero) digits is 80, while the sum is 15.

The square root of 80205 is about 283.2048728394. The cubic root of 80205 is about 43.1254673337.

The spelling of 80205 in words is "eighty thousand, two hundred five".

Divisors: 1 3 5 15 5347 16041 26735 80205