243204243043 has 4 divisors (see below), whose sum is σ = 243206037648. Its totient is φ = 243202448440.

The previous prime is 243204242971. The next prime is 243204243089. The reversal of 243204243043 is 340342402342.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 243204243043 - 2¹⁷ = 243204111971 is a prime.

It is a super-2 number, since 2×243204243043² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 243204242996 and 243204243014.

It is not an unprimeable number, because it can be changed into a prime (243204243143) 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, 675796 + ... + 971137.

It is an arithmetic number, because the mean of its divisors is an integer number (60801509412).

Almost surely, 2^243204243043 is an apocalyptic number.

243204243043 is a deficient number, since it is larger than the sum of its proper divisors (1794605).

243204243043 is a wasteful number, since it uses less digits than its factorization.

243204243043 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1794604.

The product of its (nonzero) digits is 55296, while the sum is 31.

Adding to 243204243043 its reverse (340342402342), we get a palindrome (583546645385).

The spelling of 243204243043 in words is "two hundred forty-three billion, two hundred four million, two hundred forty-three thousand, forty-three".