243353 has 4 divisors (see below), whose sum is σ = 265488. Its totient is φ = 221220.

The previous prime is 243343. The next prime is 243367. The reversal of 243353 is 353342.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 243353 - 2¹⁰ = 242329 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (243343) 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, 11051 + ... + 11072.

It is an arithmetic number, because the mean of its divisors is an integer number (66372).

2²⁴³³⁵³ is an apocalyptic number.

It is an amenable number.

243353 is a deficient number, since it is larger than the sum of its proper divisors (22135).

243353 is a wasteful number, since it uses less digits than its factorization.

243353 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22134.

The product of its digits is 1080, while the sum is 20.

The square root of 243353 is about 493.3082200815. The cubic root of 243353 is about 62.4327169271.

Adding to 243353 its reverse (353342), we get a palindrome (596695).

The spelling of 243353 in words is "two hundred forty-three thousand, three hundred fifty-three".