243140215204440 has 128 divisors (see below), whose sum is σ = 811036937548800. Its totient is φ = 64791826439040.

The previous prime is 243140215204343. The next prime is 243140215204441. The reversal of 243140215204440 is 44402512041342.

243140215204440 is a `hidden beast` number, since 2 + 4 + 3 + 1 + 4 + 0 + 2 + 1 + 5 + 204 + 440 = 666.

It is a super-2 number, since 2×243140215204440² (a number of 30 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 243140215204395 and 243140215204404.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (243140215204441) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 77567106 + ... + 80640785.

It is an arithmetic number, because the mean of its divisors is an integer number (6336226074600).

Almost surely, 2^{243140215204440} is an apocalyptic number.

243140215204440 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

243140215204440 is an abundant number, since it is smaller than the sum of its proper divisors (567896722344360).

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

243140215204440 is a wasteful number, since it uses less digits than its factorization.

243140215204440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 158209334 (or 158209324 counting only the distinct ones).

The product of its (nonzero) digits is 122880, while the sum is 36.

Adding to 243140215204440 its reverse (44402512041342), we get a palindrome (287542727245782).

The spelling of 243140215204440 in words is "two hundred forty-three trillion, one hundred forty billion, two hundred fifteen million, two hundred four thousand, four hundred forty".