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222001 = 1317077
BaseRepresentation
bin110110001100110001
3102021112021
4312030301
524101001
64431441
71613143
oct661461
9367467
10222001
1114187a
12a8581
137a080
145ac93
1545ba1
hex36331

222001 has 4 divisors (see below), whose sum is σ = 239092. Its totient is φ = 204912.

The previous prime is 221999. The next prime is 222007. The reversal of 222001 is 100222.

It is a happy number.

222001 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: 100222 = 250111.

It can be written as a sum of positive squares in 2 ways, for example, as 62001 + 160000 = 249^2 + 400^2 .

It is a cyclic number.

It is not a de Polignac number, because 222001 - 21 = 221999 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (222007) 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, 8526 + ... + 8551.

It is an arithmetic number, because the mean of its divisors is an integer number (59773).

2222001 is an apocalyptic number.

It is an amenable number.

222001 is a deficient number, since it is larger than the sum of its proper divisors (17091).

222001 is a wasteful number, since it uses less digits than its factorization.

222001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17090.

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

The square root of 222001 is about 471.1698207653. The cubic root of 222001 is about 60.5505803816.

Adding to 222001 its reverse (100222), we get a palindrome (322223).

It can be divided in two parts, 22200 and 1, that added together give a square (22201 = 1492).

The spelling of 222001 in words is "two hundred twenty-two thousand, one", and thus it is an iban number.

Divisors: 1 13 17077 222001