243105423 has 64 divisors (see below), whose sum is σ = 397135872. Its totient is φ = 130465280.

The previous prime is 243105409. The next prime is 243105439. The reversal of 243105423 is 324501342.

It is not a de Polignac number, because 243105423 - 2⁸ = 243105167 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 243105393 and 243105402.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (243105493) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 1070836 + ... + 1071062.

It is an arithmetic number, because the mean of its divisors is an integer number (6205248).

Almost surely, 2^243105423 is an apocalyptic number.

243105423 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

243105423 is a deficient number, since it is larger than the sum of its proper divisors (154030449).

243105423 is a wasteful number, since it uses less digits than its factorization.

243105423 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 364.

The product of its (nonzero) digits is 2880, while the sum is 24.

The square root of 243105423 is about 15591.8383457500. The cubic root of 243105423 is about 624.1153761224.

Adding to 243105423 its reverse (324501342), we get a palindrome (567606765).

The spelling of 243105423 in words is "two hundred forty-three million, one hundred five thousand, four hundred twenty-three".