Search a number
-
+
211045 = 542209
BaseRepresentation
bin110011100001100101
3101201111111
4303201211
523223140
64305021
71536202
oct634145
9351444
10211045
1113461a
12a2171
13750a3
1456ca9
15427ea
hex33865

211045 has 4 divisors (see below), whose sum is σ = 253260. Its totient is φ = 168832.

The previous prime is 211039. The next prime is 211049. The reversal of 211045 is 540112.

211045 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 can be written as a sum of positive squares in 2 ways, for example, as 124609 + 86436 = 353^2 + 294^2 .

It is a cyclic number.

It is not a de Polignac number, because 211045 - 29 = 210533 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (211049) 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, 21100 + ... + 21109.

It is an arithmetic number, because the mean of its divisors is an integer number (63315).

2211045 is an apocalyptic number.

It is an amenable number.

211045 is a deficient number, since it is larger than the sum of its proper divisors (42215).

211045 is an equidigital number, since it uses as much as digits as its factorization.

211045 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42214.

The product of its (nonzero) digits is 40, while the sum is 13.

The square root of 211045 is about 459.3963430416. The cubic root of 211045 is about 59.5376500641.

Adding to 211045 its reverse (540112), we get a palindrome (751157).

It can be divided in two parts, 21 and 1045, that multiplied together give a triangular number (21945 = T209).

The spelling of 211045 in words is "two hundred eleven thousand, forty-five".

Divisors: 1 5 42209 211045