243043131 has 16 divisors (see below), whose sum is σ = 335329280. Its totient is φ = 156418560.

The previous prime is 243043127. The next prime is 243043133. The reversal of 243043131 is 131340342.

It is not a de Polignac number, because 243043131 - 2² = 243043127 is a prime.

It is a super-2 number, since 2×243043131² = 118139927052566322, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 243043098 and 243043107.

It is not an unprimeable number, because it can be changed into a prime (243043133) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 37851 + ... + 43803.

It is an arithmetic number, because the mean of its divisors is an integer number (20958080).

Almost surely, 2^243043131 is an apocalyptic number.

243043131 is a deficient number, since it is larger than the sum of its proper divisors (92286149).

243043131 is a wasteful number, since it uses less digits than its factorization.

243043131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6426.

The product of its (nonzero) digits is 864, while the sum is 21.

The square root of 243043131 is about 15589.8406342079. The cubic root of 243043131 is about 624.0620649353.

Adding to 243043131 its reverse (131340342), we get a palindrome (374383473).

The spelling of 243043131 in words is "two hundred forty-three million, forty-three thousand, one hundred thirty-one".