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2180223 = 3380749
BaseRepresentation
bin1000010100010001111111
311002202201000
420110101333
51024231343
6114421343
724350223
oct10242177
94082630
102180223
11125a041
12891853
135b4496
1440a783
152d0ed3
hex21447f

2180223 has 8 divisors (see below), whose sum is σ = 3230000. Its totient is φ = 1453464.

The previous prime is 2180221. The next prime is 2180251. The reversal of 2180223 is 3220812.

It is a happy number.

2180223 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 2180223 - 21 = 2180221 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2180196 and 2180205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2180221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 40348 + ... + 40401.

It is an arithmetic number, because the mean of its divisors is an integer number (403750).

22180223 is an apocalyptic number.

2180223 is a deficient number, since it is larger than the sum of its proper divisors (1049777).

2180223 is an equidigital number, since it uses as much as digits as its factorization.

2180223 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 80758 (or 80752 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 18.

The square root of 2180223 is about 1476.5578214212. The cubic root of 2180223 is about 129.6682468056.

The spelling of 2180223 in words is "two million, one hundred eighty thousand, two hundred twenty-three".

Divisors: 1 3 9 27 80749 242247 726741 2180223