243133344431 has 4 divisors (see below), whose sum is σ = 243137206632. Its totient is φ = 243129482232.

The previous prime is 243133344343. The next prime is 243133344451. The reversal of 243133344431 is 134443331342.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 134443331342 = 2 ⋅67221665671.

It is a cyclic number.

It is not a de Polignac number, because 243133344431 - 2¹⁰ = 243133343407 is a prime.

It is a super-2 number, since 2×243133344431² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 243133344391 and 243133344400.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (243133344451) 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, 1835081 + ... + 1963106.

It is an arithmetic number, because the mean of its divisors is an integer number (60784301658).

Almost surely, 2^243133344431 is an apocalyptic number.

243133344431 is a deficient number, since it is larger than the sum of its proper divisors (3862201).

243133344431 is an equidigital number, since it uses as much as digits as its factorization.

243133344431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3862200.

The product of its digits is 124416, while the sum is 35.

Adding to 243133344431 its reverse (134443331342), we get a palindrome (377576675773).

The spelling of 243133344431 in words is "two hundred forty-three billion, one hundred thirty-three million, three hundred forty-four thousand, four hundred thirty-one".