243232205340 has 48 divisors (see below), whose sum is σ = 681073787520. Its totient is φ = 64859672640.

The previous prime is 243232205327. The next prime is 243232205347. The reversal of 243232205340 is 43502232342.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a junction number, because it is equal to n+sod(n) for n = 243232205298 and 243232205307.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (243232205347) 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 15 ways as a sum of consecutive naturals, for example, 2381851 + ... + 2481869.

It is an arithmetic number, because the mean of its divisors is an integer number (14189037240).

Almost surely, 2^243232205340 is an apocalyptic number.

243232205340 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

243232205340 is an abundant number, since it is smaller than the sum of its proper divisors (437841582180).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

243232205340 is a wasteful number, since it uses less digits than its factorization.

243232205340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 140562 (or 140560 counting only the distinct ones).

The product of its (nonzero) digits is 34560, while the sum is 30.

Adding to 243232205340 its reverse (43502232342), we get a palindrome (286734437682).

The spelling of 243232205340 in words is "two hundred forty-three billion, two hundred thirty-two million, two hundred five thousand, three hundred forty".