243431444 has 24 divisors (see below), whose sum is σ = 431092200. Its totient is φ = 120268800.

The previous prime is 243431443. The next prime is 243431453. The reversal of 243431444 is 444134342.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 29920900 + 213510544 = 5470^2 + 14612^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (243431443) 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 7 ways as a sum of consecutive naturals, for example, 261572 + ... + 262500.

It is an arithmetic number, because the mean of its divisors is an integer number (17962175).

Almost surely, 2^243431444 is an apocalyptic number.

It is an amenable number.

243431444 is a deficient number, since it is larger than the sum of its proper divisors (187660756).

243431444 is a wasteful number, since it uses less digits than its factorization.

243431444 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1643 (or 1641 counting only the distinct ones).

The product of its digits is 18432, while the sum is 29.

The square root of 243431444 is about 15602.2897037582. The cubic root of 243431444 is about 624.3942453010.

Adding to 243431444 its reverse (444134342), we get a palindrome (687565786).

The spelling of 243431444 in words is "two hundred forty-three million, four hundred thirty-one thousand, four hundred forty-four".