243432123 has 32 divisors (see below), whose sum is σ = 374784000. Its totient is φ = 138996000.

The previous prime is 243432121. The next prime is 243432173. The reversal of 243432123 is 321234342.

It is not a de Polignac number, because 243432123 - 2¹ = 243432121 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 243432093 and 243432102.

It is not an unprimeable number, because it can be changed into a prime (243432121) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 123798 + ... + 125748.

It is an arithmetic number, because the mean of its divisors is an integer number (11712000).

Almost surely, 2^243432123 is an apocalyptic number.

243432123 is a deficient number, since it is larger than the sum of its proper divisors (131351877).

243432123 is a wasteful number, since it uses less digits than its factorization.

243432123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2183.

The product of its digits is 3456, while the sum is 24.

The square root of 243432123 is about 15602.3114633698. The cubic root of 243432123 is about 624.3948258386.

Adding to 243432123 its reverse (321234342), we get a palindrome (564666465).

The spelling of 243432123 in words is "two hundred forty-three million, four hundred thirty-two thousand, one hundred twenty-three".