Search a number
-
+
144217 = 294973
BaseRepresentation
bin100011001101011001
321022211101
4203031121
514103332
63031401
71140313
oct431531
9238741
10144217
1199397
126b561
1350848
143a7b3
152cae7
hex23359

144217 has 4 divisors (see below), whose sum is σ = 149220. Its totient is φ = 139216.

The previous prime is 144203. The next prime is 144223. The reversal of 144217 is 712441.

144217 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, and also an emirpimes, since its reverse is a distinct semiprime: 712441 = 4911451.

It can be written as a sum of positive squares in 2 ways, for example, as 84681 + 59536 = 291^2 + 244^2 .

It is a cyclic number.

It is not a de Polignac number, because 144217 - 211 = 142169 is a prime.

It is a Duffinian number.

It is a plaindrome in base 16.

It is a junction number, because it is equal to n+sod(n) for n = 144194 and 144203.

It is not an unprimeable number, because it can be changed into a prime (144247) 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, 2458 + ... + 2515.

It is an arithmetic number, because the mean of its divisors is an integer number (37305).

2144217 is an apocalyptic number.

It is an amenable number.

144217 is a deficient number, since it is larger than the sum of its proper divisors (5003).

144217 is an equidigital number, since it uses as much as digits as its factorization.

144217 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5002.

The product of its digits is 224, while the sum is 19.

The square root of 144217 is about 379.7591341890. The cubic root of 144217 is about 52.4411434145.

Adding to 144217 its product of digits (224), we get a palindrome (144441).

Adding to 144217 its reverse (712441), we get a palindrome (856658).

It can be divided in two parts, 144 and 217, that added together give a square (361 = 192).

The spelling of 144217 in words is "one hundred forty-four thousand, two hundred seventeen", and thus it is an iban number.

Divisors: 1 29 4973 144217