243012423 has 4 divisors (see below), whose sum is σ = 324016568. Its totient is φ = 162008280.

The previous prime is 243012421. The next prime is 243012443. The reversal of 243012423 is 324210342.

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

It is not a de Polignac number, because 243012423 - 2¹ = 243012421 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 243012423.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (243012421) 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, 40502068 + ... + 40502073.

It is an arithmetic number, because the mean of its divisors is an integer number (81004142).

Almost surely, 2^243012423 is an apocalyptic number.

243012423 is a deficient number, since it is larger than the sum of its proper divisors (81004145).

243012423 is an equidigital number, since it uses as much as digits as its factorization.

243012423 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 81004144.

The product of its (nonzero) digits is 1152, while the sum is 21.

The square root of 243012423 is about 15588.8557309380. The cubic root of 243012423 is about 624.0357808419.

Adding to 243012423 its reverse (324210342), we get a palindrome (567222765).

The spelling of 243012423 in words is "two hundred forty-three million, twelve thousand, four hundred twenty-three".