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200221 = 728603
BaseRepresentation
bin110000111000011101
3101011122121
4300320131
522401341
64142541
71462510
oct607035
9334577
10200221
1112747a
1297a51
1370198
1452d77
153e4d1
hex30e1d

200221 has 4 divisors (see below), whose sum is σ = 228832. Its totient is φ = 171612.

The previous prime is 200201. The next prime is 200227. The reversal of 200221 is 122002.

It is a happy number.

200221 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 a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 122002 = 261001.

It is not a de Polignac number, because 200221 - 211 = 198173 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (7), and also a Moran number because the ratio is a prime number: 28603 = 200221 / (2 + 0 + 0 + 2 + 2 + 1).

It is a Duffinian number.

It is a plaindrome in base 9.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (200227) 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, 14295 + ... + 14308.

It is an arithmetic number, because the mean of its divisors is an integer number (57208).

2200221 is an apocalyptic number.

It is an amenable number.

200221 is a deficient number, since it is larger than the sum of its proper divisors (28611).

200221 is an equidigital number, since it uses as much as digits as its factorization.

200221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28610.

The product of its (nonzero) digits is 8, while the sum is 7.

The square root of 200221 is about 447.4606127918. The cubic root of 200221 is about 58.5018870991.

Adding to 200221 its reverse (122002), we get a palindrome (322223).

The spelling of 200221 in words is "two hundred thousand, two hundred twenty-one", and thus it is an iban number.

Divisors: 1 7 28603 200221