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212423 is a prime number
BaseRepresentation
bin110011110111000111
3101210101112
4303313013
523244143
64315235
71543211
oct636707
9353345
10212423
11135662
12a2b1b
13758c3
14575b1
1542e18
hex33dc7

212423 has 2 divisors, whose sum is σ = 212424. Its totient is φ = 212422.

The previous prime is 212419. The next prime is 212437. The reversal of 212423 is 324212.

It is an a-pointer prime, because the next prime (212437) can be obtained adding 212423 to its sum of digits (14).

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 212423 - 22 = 212419 is a prime.

It is equal to p19004 and since 212423 and 19004 have the same sum of digits, it is a Honaker prime.

It is a junction number, because it is equal to n+sod(n) for n = 212398 and 212407.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (212453) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106211 + 106212.

It is an arithmetic number, because the mean of its divisors is an integer number (106212).

2212423 is an apocalyptic number.

212423 is a deficient number, since it is larger than the sum of its proper divisors (1).

212423 is an equidigital number, since it uses as much as digits as its factorization.

212423 is an evil number, because the sum of its binary digits is even.

The product of its digits is 96, while the sum is 14.

The square root of 212423 is about 460.8936970712. The cubic root of 212423 is about 59.6669510232. Note that the first 3 decimals are identical.

Adding to 212423 its reverse (324212), we get a palindrome (536635).

It can be divided in two parts, 212 and 423, that multiplied together give a triangular number (89676 = T423).

The spelling of 212423 in words is "two hundred twelve thousand, four hundred twenty-three", and thus it is an iban number.