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212443 = 7113189
BaseRepresentation
bin110011110111011011
3101210102021
4303313123
523244233
64315311
71543240
oct636733
9353367
10212443
11135680
12a2b37
137590a
14575c7
1542e2d
hex33ddb

212443 has 16 divisors (see below), whose sum is σ = 276480. Its totient is φ = 158400.

The previous prime is 212437. The next prime is 212447. The reversal of 212443 is 344212.

It is not a de Polignac number, because 212443 - 25 = 212411 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (212447) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2343 + ... + 2431.

It is an arithmetic number, because the mean of its divisors is an integer number (17280).

2212443 is an apocalyptic number.

212443 is a deficient number, since it is larger than the sum of its proper divisors (64037).

212443 is a wasteful number, since it uses less digits than its factorization.

212443 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 138.

The product of its digits is 192, while the sum is 16.

The square root of 212443 is about 460.9153935377. The cubic root of 212443 is about 59.6688235473.

Adding to 212443 its reverse (344212), we get a palindrome (556655).

Subtracting 212443 from its reverse (344212), we obtain a square (131769 = 3632).

The spelling of 212443 in words is "two hundred twelve thousand, four hundred forty-three", and thus it is an iban number.

Divisors: 1 7 11 31 77 89 217 341 623 979 2387 2759 6853 19313 30349 212443