243255 has 8 divisors (see below), whose sum is σ = 389232. Its totient is φ = 129728.

The previous prime is 243239. The next prime is 243259. The reversal of 243255 is 552342.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 243255 - 2⁴ = 243239 is a prime.

243255 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (243259) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8094 + ... + 8123.

It is an arithmetic number, because the mean of its divisors is an integer number (48654).

2²⁴³²⁵⁵ is an apocalyptic number.

243255 is a deficient number, since it is larger than the sum of its proper divisors (145977).

243255 is a wasteful number, since it uses less digits than its factorization.

243255 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16225.

The product of its digits is 1200, while the sum is 21.

The square root of 243255 is about 493.2088806986. The cubic root of 243255 is about 62.4243351008.

Adding to 243255 its reverse (552342), we get a palindrome (795597).

The spelling of 243255 in words is "two hundred forty-three thousand, two hundred fifty-five".