243143421023 has 4 divisors (see below), whose sum is σ = 243144424248. Its totient is φ = 243142417800.

The previous prime is 243143420999. The next prime is 243143421049. The reversal of 243143421023 is 320124341342.

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 not a de Polignac number, because 243143421023 - 2⁶ = 243143420959 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (243143421923) 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, 112748 + ... + 706398.

It is an arithmetic number, because the mean of its divisors is an integer number (60786106062).

Almost surely, 2^243143421023 is an apocalyptic number.

243143421023 is a deficient number, since it is larger than the sum of its proper divisors (1003225).

243143421023 is an equidigital number, since it uses as much as digits as its factorization.

243143421023 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1003224.

The product of its (nonzero) digits is 13824, while the sum is 29.

Adding to 243143421023 its reverse (320124341342), we get a palindrome (563267762365).

The spelling of 243143421023 in words is "two hundred forty-three billion, one hundred forty-three million, four hundred twenty-one thousand, twenty-three".