Search a number
-
+
180055 = 536011
BaseRepresentation
bin101011111101010111
3100010222201
4223331113
521230210
63505331
71346641
oct537527
9303881
10180055
11113307
1288247
1363c55
1449891
153853a
hex2bf57

180055 has 4 divisors (see below), whose sum is σ = 216072. Its totient is φ = 144040.

The previous prime is 180053. The next prime is 180071. The reversal of 180055 is 550081.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 550081 = 778583.

It is not a de Polignac number, because 180055 - 21 = 180053 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (180053) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 18001 + ... + 18010.

It is an arithmetic number, because the mean of its divisors is an integer number (54018).

2180055 is an apocalyptic number.

180055 is a deficient number, since it is larger than the sum of its proper divisors (36017).

180055 is an equidigital number, since it uses as much as digits as its factorization.

180055 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36016.

The product of its (nonzero) digits is 200, while the sum is 19.

The square root of 180055 is about 424.3288818829. The cubic root of 180055 is about 56.4679119230.

The spelling of 180055 in words is "one hundred eighty thousand, fifty-five".

Divisors: 1 5 36011 180055