243043031 has 16 divisors (see below), whose sum is σ = 303367680. Its totient is φ = 189163680.

The previous prime is 243043019. The next prime is 243043043. The reversal of 243043031 is 130340342.

It is an interprime number because it is at equal distance from previous prime (243043019) and next prime (243043043).

It is a cyclic number.

It is not a de Polignac number, because 243043031 - 2¹⁴ = 243026647 is a prime.

It is a super-2 number, since 2×243043031² = 118139829835333922, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 243042994 and 243043012.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (243043081) 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, 104105 + ... + 106413.

It is an arithmetic number, because the mean of its divisors is an integer number (18960480).

Almost surely, 2^243043031 is an apocalyptic number.

243043031 is a deficient number, since it is larger than the sum of its proper divisors (60324649).

243043031 is a wasteful number, since it uses less digits than its factorization.

243043031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3694.

The product of its (nonzero) digits is 864, while the sum is 20.

The square root of 243043031 is about 15589.8374269907. The cubic root of 243043031 is about 624.0619793452.

Adding to 243043031 its reverse (130340342), we get a palindrome (373383373).

The spelling of 243043031 in words is "two hundred forty-three million, forty-three thousand, thirty-one".