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BaseRepresentation
bin110100000011111111
3101211112001
4310003333
523310442
64323131
71545466
oct640377
9354461
10213247
11136241
12a34a7
13760a8
14579dd
15432b7
hex340ff

213247 has 2 divisors, whose sum is σ = 213248. Its totient is φ = 213246.

The previous prime is 213229. The next prime is 213253. The reversal of 213247 is 742312.

Adding to 213247 its reverse (742312), we get a palindrome (955559).

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 213247 - 27 = 213119 is a prime.

It is a plaindrome in base 14.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (213217) 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 as a sum of consecutive naturals, namely, 106623 + 106624.

It is an arithmetic number, because the mean of its divisors is an integer number (106624).

2213247 is an apocalyptic number.

213247 is a deficient number, since it is larger than the sum of its proper divisors (1).

213247 is an equidigital number, since it uses as much as digits as its factorization.

213247 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 336, while the sum is 19.

The square root of 213247 is about 461.7867473196. The cubic root of 213247 is about 59.7440018955.

The spelling of 213247 in words is "two hundred thirteen thousand, two hundred forty-seven".