243481 has 6 divisors (see below), whose sum is σ = 283290. Its totient is φ = 208656.

The previous prime is 243479. The next prime is 243487. The reversal of 243481 is 184342.

It can be written as a sum of positive squares in only one way, i.e., 176400 + 67081 = 420^2 + 259^2 .

It is not a de Polignac number, because 243481 - 2¹ = 243479 is a prime.

It is a super-2 number, since 2×243481² = 118565994722, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (243487) 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 5 ways as a sum of consecutive naturals, for example, 2436 + ... + 2533.

It is an arithmetic number, because the mean of its divisors is an integer number (47215).

2²⁴³⁴⁸¹ is an apocalyptic number.

It is an amenable number.

243481 is a deficient number, since it is larger than the sum of its proper divisors (39809).

243481 is an equidigital number, since it uses as much as digits as its factorization.

243481 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4983 (or 4976 counting only the distinct ones).

The product of its digits is 768, while the sum is 22.

The square root of 243481 is about 493.4379393602. The cubic root of 243481 is about 62.4436612303.

The spelling of 243481 in words is "two hundred forty-three thousand, four hundred eighty-one".