43135253032440 has 512 divisors, whose sum is σ = 139215283200000. Its totient is φ = 10668099133440.

The previous prime is 43135253032439. The next prime is 43135253032447. The reversal of 43135253032440 is 4423035253134.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (43135253032447) by changing a digit.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 8621874979 + ... + 8621879981.

It is an arithmetic number, because the mean of its divisors is an integer number (271904850000).

Almost surely, 2^{43135253032440} is an apocalyptic number.

43135253032440 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 43135253032440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (69607641600000).

43135253032440 is an abundant number, since it is smaller than the sum of its proper divisors (96080030167560).

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

43135253032440 is a wasteful number, since it uses less digits than its factorization.

43135253032440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5655 (or 5651 counting only the distinct ones).

The product of its (nonzero) digits is 518400, while the sum is 39.

Adding to 43135253032440 its reverse (4423035253134), we get a palindrome (47558288285574).

The spelling of 43135253032440 in words is "forty-three trillion, one hundred thirty-five billion, two hundred fifty-three million, thirty-two thousand, four hundred forty".