243442023 has 16 divisors (see below), whose sum is σ = 374927616. Its totient is φ = 138861440.

The previous prime is 243442019. The next prime is 243442061. The reversal of 243442023 is 320244342.

It is not a de Polignac number, because 243442023 - 2² = 243442019 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 243441984 and 243442002.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (243442063) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 216411 + ... + 217532.

It is an arithmetic number, because the mean of its divisors is an integer number (23432976).

Almost surely, 2^243442023 is an apocalyptic number.

243442023 is a deficient number, since it is larger than the sum of its proper divisors (131485593).

243442023 is a wasteful number, since it uses less digits than its factorization.

243442023 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 433974.

The product of its (nonzero) digits is 4608, while the sum is 24.

The square root of 243442023 is about 15602.6287208278. The cubic root of 243442023 is about 624.4032901077.

Adding to 243442023 its reverse (320244342), we get a palindrome (563686365).

The spelling of 243442023 in words is "two hundred forty-three million, four hundred forty-two thousand, twenty-three".