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BaseRepresentation
bin111010111111101
31112102201
413113331
51431310
6351501
7154030
oct72775
945381
1030205
112076a
1215591
1310996
14b017
158e3a
hex75fd

30205 has 8 divisors (see below), whose sum is σ = 41472. Its totient is φ = 20688.

The previous prime is 30203. The next prime is 30211. The reversal of 30205 is 50203.

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

It is a cyclic number.

It is not a de Polignac number, because 30205 - 21 = 30203 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 30191 and 30200.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30203) 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, 397 + ... + 466.

It is an arithmetic number, because the mean of its divisors is an integer number (5184).

230205 is an apocalyptic number.

30205 is a gapful number since it is divisible by the number (35) formed by its first and last digit.

It is an amenable number.

30205 is a deficient number, since it is larger than the sum of its proper divisors (11267).

30205 is an equidigital number, since it uses as much as digits as its factorization.

30205 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 875.

The product of its (nonzero) digits is 30, while the sum is 10.

The square root of 30205 is about 173.7958572579. The cubic root of 30205 is about 31.1429403086.

Adding to 30205 its reverse (50203), we get a palindrome (80408).

It can be divided in two parts, 3020 and 5, that added together give a square (3025 = 552).

The spelling of 30205 in words is "thirty thousand, two hundred five".

Divisors: 1 5 7 35 863 4315 6041 30205