43431042242340 has 72 divisors (see below), whose sum is σ = 131903672617080. Its totient is φ = 11567295266304.

The previous prime is 43431042242267. The next prime is 43431042242347. The reversal of 43431042242340 is 4324224013434.

43431042242340 is a `hidden beast` number, since 4 + 3 + 4 + 31 + 0 + 42 + 242 + 340 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 19593583543296 + 23837458699044 = 4426464^2 + 4882362^2 .

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 = 43431042242295 and 43431042242304.

It is not an unprimeable number, because it can be changed into a prime (43431042242347) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 148978959 + ... + 149270198.

It is an arithmetic number, because the mean of its divisors is an integer number (1831995453015).

Almost surely, 2^{43431042242340} is an apocalyptic number.

It is an amenable number.

43431042242340 is an abundant number, since it is smaller than the sum of its proper divisors (88472630374740).

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

43431042242340 is a wasteful number, since it uses less digits than its factorization.

43431042242340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 298249981 (or 298249976 counting only the distinct ones).

The product of its (nonzero) digits is 221184, while the sum is 36.

Adding to 43431042242340 its reverse (4324224013434), we get a palindrome (47755266255774).

The spelling of 43431042242340 in words is "forty-three trillion, four hundred thirty-one billion, forty-two million, two hundred forty-two thousand, three hundred forty".