243243023 has 4 divisors (see below), whose sum is σ = 247832568. Its totient is φ = 238653480.

The previous prime is 243242999. The next prime is 243243043. The reversal of 243243023 is 320342342.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 320342342 = 2 ⋅160171171.

It is a cyclic number.

It is not a de Polignac number, because 243243023 - 2²⁶ = 176134159 is a prime.

It is a Duffinian number.

It is a zygodrome in base 2.

It is a self number, because there is not a number n which added to its sum of digits gives 243243023.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (243243043) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2294693 + ... + 2294798.

It is an arithmetic number, because the mean of its divisors is an integer number (61958142).

Almost surely, 2^243243023 is an apocalyptic number.

243243023 is a deficient number, since it is larger than the sum of its proper divisors (4589545).

243243023 is an equidigital number, since it uses as much as digits as its factorization.

243243023 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4589544.

The product of its (nonzero) digits is 3456, while the sum is 23.

The square root of 243243023 is about 15596.2502865272. The cubic root of 243243023 is about 624.2331056752.

Adding to 243243023 its reverse (320342342), we get a palindrome (563585365).

The spelling of 243243023 in words is "two hundred forty-three million, two hundred forty-three thousand, twenty-three".