243243123436 has 12 divisors (see below), whose sum is σ = 432890304840. Its totient is φ = 119560179200.

The previous prime is 243243123311. The next prime is 243243123443. The reversal of 243243123436 is 634321342342.

It is a happy number.

It is a super-2 number, since 2×243243123436² (a number of 24 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 243243123395 and 243243123404.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 515345365 + ... + 515345836.

It is an arithmetic number, because the mean of its divisors is an integer number (36074192070).

Almost surely, 2^243243123436 is an apocalyptic number.

It is an amenable number.

243243123436 is a deficient number, since it is larger than the sum of its proper divisors (189647181404).

243243123436 is a wasteful number, since it uses less digits than its factorization.

243243123436 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1030691264 (or 1030691262 counting only the distinct ones).

The product of its digits is 248832, while the sum is 37.

Adding to 243243123436 its reverse (634321342342), we get a palindrome (877564465778).

The spelling of 243243123436 in words is "two hundred forty-three billion, two hundred forty-three million, one hundred twenty-three thousand, four hundred thirty-six".