243424031 has 4 divisors (see below), whose sum is σ = 243456864. Its totient is φ = 243391200.

The previous prime is 243424009. The next prime is 243424061. The reversal of 243424031 is 130424342.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-243424031 is a prime.

It is a super-2 number, since 2×243424031² = 118510517736577922, 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 = 243423988 and 243424006.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (243424061) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 551 + ... + 22071.

It is an arithmetic number, because the mean of its divisors is an integer number (60864216).

Almost surely, 2^243424031 is an apocalyptic number.

243424031 is a deficient number, since it is larger than the sum of its proper divisors (32833).

243424031 is a wasteful number, since it uses less digits than its factorization.

243424031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32832.

The product of its (nonzero) digits is 2304, while the sum is 23.

The square root of 243424031 is about 15602.0521406641. The cubic root of 243424031 is about 624.3879071969.

Adding to 243424031 its reverse (130424342), we get a palindrome (373848373).

The spelling of 243424031 in words is "two hundred forty-three million, four hundred twenty-four thousand, thirty-one".