243120454431 has 4 divisors (see below), whose sum is σ = 324160605912. Its totient is φ = 162080302952.

The previous prime is 243120454427. The next prime is 243120454457. The reversal of 243120454431 is 134454021342.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 243120454431 - 2² = 243120454427 is a prime.

It is a super-2 number, since 2×243120454431² (a number of 24 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 243120454392 and 243120454401.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (243120454931) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 40520075736 + ... + 40520075741.

It is an arithmetic number, because the mean of its divisors is an integer number (81040151478).

Almost surely, 2^243120454431 is an apocalyptic number.

243120454431 is a deficient number, since it is larger than the sum of its proper divisors (81040151481).

243120454431 is an equidigital number, since it uses as much as digits as its factorization.

243120454431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 81040151480.

The product of its (nonzero) digits is 46080, while the sum is 33.

Adding to 243120454431 its reverse (134454021342), we get a palindrome (377574475773).

The spelling of 243120454431 in words is "two hundred forty-three billion, one hundred twenty million, four hundred fifty-four thousand, four hundred thirty-one".