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225543 = 375181
BaseRepresentation
bin110111000100000111
3102110101110
4313010013
524204133
64500103
71626363
oct670407
9373343
10225543
111444aa
12aa633
137b876
145c2a3
1546c63
hex37107

225543 has 4 divisors (see below), whose sum is σ = 300728. Its totient is φ = 150360.

The previous prime is 225529. The next prime is 225569. The reversal of 225543 is 345522.

Subtracting from 225543 its sum of digits (21), we obtain a palindrome (225522).

It can be divided in two parts, 22 and 5543, that added together give a triangular number (5565 = T105).

225543 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is not a de Polignac number, because 225543 - 24 = 225527 is a prime.

It is a d-powerful number, because it can be written as 211 + 213 + 57 + 57 + 4 + 310 .

It is a D-number.

It is a Duffinian number.

225543 is a lucky number.

It is a plaindrome in base 11.

It is a nialpdrome in base 12.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (225503) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 37588 + ... + 37593.

It is an arithmetic number, because the mean of its divisors is an integer number (75182).

2225543 is an apocalyptic number.

225543 is a deficient number, since it is larger than the sum of its proper divisors (75185).

225543 is an equidigital number, since it uses as much as digits as its factorization.

225543 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 75184.

The product of its digits is 1200, while the sum is 21.

The square root of 225543 is about 474.9136763666. The cubic root of 225543 is about 60.8709085847.

The spelling of 225543 in words is "two hundred twenty-five thousand, five hundred forty-three".

Divisors: 1 3 75181 225543