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212323 = 673169
BaseRepresentation
bin110011110101100011
3101210020211
4303311203
523243243
64314551
71543006
oct636543
9353224
10212323
11135581
12a2a57
1375847
145753d
1542d9d
hex33d63

212323 has 4 divisors (see below), whose sum is σ = 215560. Its totient is φ = 209088.

The previous prime is 212297. The next prime is 212353. The reversal of 212323 is 323212.

It is a happy number.

212323 is an esthetic number in base 10, because in such base its adjacent digits differ by 1.

It is a semiprime because it is the product of two primes.

It is a 6-Lehmer number, since φ(212323) divides (212323-1)6.

It is a cyclic number.

It is not a de Polignac number, because 212323 - 29 = 211811 is a prime.

It is an alternating number because its digits alternate between even and odd.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (212353) 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 3 ways as a sum of consecutive naturals, for example, 1518 + ... + 1651.

It is an arithmetic number, because the mean of its divisors is an integer number (53890).

2212323 is an apocalyptic number.

212323 is a deficient number, since it is larger than the sum of its proper divisors (3237).

212323 is an equidigital number, since it uses as much as digits as its factorization.

212323 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3236.

The product of its digits is 72, while the sum is 13.

The square root of 212323 is about 460.7851994151. The cubic root of 212323 is about 59.6575866392.

Adding to 212323 its reverse (323212), we get a palindrome (535535).

Subtracting 212323 from its reverse (323212), we obtain a square (110889 = 3332).

It can be divided in two parts, 212 and 323, that added together give a palindrome (535).

The spelling of 212323 in words is "two hundred twelve thousand, three hundred twenty-three", and thus it is an iban number.

Divisors: 1 67 3169 212323