243432240023 has 4 divisors (see below), whose sum is σ = 278208274320. Its totient is φ = 208656205728.

The previous prime is 243432240013. The next prime is 243432240031. The reversal of 243432240023 is 320042234342.

It is a happy number.

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 243432240023 - 2⁸ = 243432239767 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 (243432240013) 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, 17388017138 + ... + 17388017151.

It is an arithmetic number, because the mean of its divisors is an integer number (69552068580).

Almost surely, 2^243432240023 is an apocalyptic number.

243432240023 is a deficient number, since it is larger than the sum of its proper divisors (34776034297).

243432240023 is an equidigital number, since it uses as much as digits as its factorization.

243432240023 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34776034296.

The product of its (nonzero) digits is 27648, while the sum is 29.

Adding to 243432240023 its reverse (320042234342), we get a palindrome (563474474365).

The spelling of 243432240023 in words is "two hundred forty-three billion, four hundred thirty-two million, two hundred forty thousand, twenty-three".