210243 has 16 divisors (see below), whose sum is σ = 320256. Its totient is φ = 121440.

The previous prime is 210241. The next prime is 210247. The reversal of 210243 is 342012.

210243 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 210243 - 2¹ = 210241 is a prime.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 210243.

It is not an unprimeable number, because it can be changed into a prime (210241) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 621 + ... + 897.

It is an arithmetic number, because the mean of its divisors is an integer number (20016).

2²¹⁰²⁴³ is an apocalyptic number.

210243 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

210243 is a deficient number, since it is larger than the sum of its proper divisors (110013).

210243 is a wasteful number, since it uses less digits than its factorization.

210243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 314.

The product of its (nonzero) digits is 48, while the sum is 12.

The square root of 210243 is about 458.5226275769. The cubic root of 210243 is about 59.4621372463.

Adding to 210243 its reverse (342012), we get a palindrome (552255).

Subtracting 210243 from its reverse (342012), we obtain a square (131769 = 363²).

It can be divided in two parts, 2102 and 43, that added together give a triangular number (2145 = T₆₅).

The spelling of 210243 in words is "two hundred ten thousand, two hundred forty-three", and thus it is an iban number.