243444131 has 16 divisors (see below), whose sum is σ = 310095360. Its totient is φ = 186053760.

The previous prime is 243444079. The next prime is 243444143. The reversal of 243444131 is 131444342.

It is a cyclic number.

It is not a de Polignac number, because 243444131 - 2¹⁴ = 243427747 is a prime.

It is a super-2 number, since 2×243444131² = 118530089836690322, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 243444131.

It is not an unprimeable number, because it can be changed into a prime (243444151) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 51575 + ... + 56096.

It is an arithmetic number, because the mean of its divisors is an integer number (19380960).

Almost surely, 2^243444131 is an apocalyptic number.

243444131 is a deficient number, since it is larger than the sum of its proper divisors (66651229).

243444131 is a wasteful number, since it uses less digits than its factorization.

243444131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 107714.

The product of its digits is 4608, while the sum is 26.

The square root of 243444131 is about 15602.6962734010. The cubic root of 243444131 is about 624.4050923689.

Adding to 243444131 its reverse (131444342), we get a palindrome (374888473).

The spelling of 243444131 in words is "two hundred forty-three million, four hundred forty-four thousand, one hundred thirty-one".