243123503340 has 96 divisors (see below), whose sum is σ = 716758560000. Its totient is φ = 61404901632.

The previous prime is 243123503327. The next prime is 243123503341. The reversal of 243123503340 is 43305321342.

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 = 243123503298 and 243123503307.

It is not an unprimeable number, because it can be changed into a prime (243123503341) 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 31 ways as a sum of consecutive naturals, for example, 4784386 + ... + 4834934.

It is an arithmetic number, because the mean of its divisors is an integer number (7466235000).

Almost surely, 2^243123503340 is an apocalyptic number.

243123503340 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

243123503340 is an abundant number, since it is smaller than the sum of its proper divisors (473635056660).

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

243123503340 is a wasteful number, since it uses less digits than its factorization.

243123503340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 54799 (or 54797 counting only the distinct ones).

The product of its (nonzero) digits is 25920, while the sum is 30.

Adding to 243123503340 its reverse (43305321342), we get a palindrome (286428824682).

The spelling of 243123503340 in words is "two hundred forty-three billion, one hundred twenty-three million, five hundred three thousand, three hundred forty".