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23105 = 54621
BaseRepresentation
bin101101001000001
31011200202
411221001
51214410
6254545
7124235
oct55101
934622
1023105
11163a5
1211455
13a694
1485c5
156ca5
hex5a41

23105 has 4 divisors (see below), whose sum is σ = 27732. Its totient is φ = 18480.

The previous prime is 23099. The next prime is 23117. The reversal of 23105 is 50132.

Adding to 23105 its reverse (50132), we get a palindrome (73237).

It can be divided in two parts, 23 and 105, that multiplied together give a triangular number (2415 = T69).

It is a Cunningham number, because it is equal to 1522+1.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 8464 + 14641 = 92^2 + 121^2 .

It is not a de Polignac number, because 23105 - 26 = 23041 is a prime.

It is a Duffinian number.

It is a plaindrome in base 12.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2306 + ... + 2315.

It is an arithmetic number, because the mean of its divisors is an integer number (6933).

223105 is an apocalyptic number.

It is an amenable number.

23105 is a deficient number, since it is larger than the sum of its proper divisors (4627).

23105 is an equidigital number, since it uses as much as digits as its factorization.

23105 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4626.

The product of its (nonzero) digits is 30, while the sum is 11.

The square root of 23105 is about 152.0032894381. The cubic root of 23105 is about 28.4818803465.

The spelling of 23105 in words is "twenty-three thousand, one hundred five".

Divisors: 1 5 4621 23105