243331 has 6 divisors (see below), whose sum is σ = 267596. Its totient is φ = 221100.

The previous prime is 243311. The next prime is 243343. The reversal of 243331 is 133342.

It is not a de Polignac number, because 243331 - 2⁷ = 243203 is a prime.

It is a super-2 number, since 2×243331² = 118419951122, which contains 22 as substring.

It is a Duffinian number.

243331 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (243301) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 885 + ... + 1126.

2²⁴³³³¹ is an apocalyptic number.

243331 is a deficient number, since it is larger than the sum of its proper divisors (24265).

243331 is a wasteful number, since it uses less digits than its factorization.

243331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2033 (or 2022 counting only the distinct ones).

The product of its digits is 216, while the sum is 16.

The square root of 243331 is about 493.2859211451. The cubic root of 243331 is about 62.4308354886.

Adding to 243331 its reverse (133342), we get a palindrome (376673).

The spelling of 243331 in words is "two hundred forty-three thousand, three hundred thirty-one".