43040013531 has 8 divisors (see below), whose sum is σ = 58469452560. Its totient is φ = 28151958432.

The previous prime is 43040013469. The next prime is 43040013553. The reversal of 43040013531 is 13531004034.

It is a happy number.

43040013531 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 43040013531 - 2²⁵ = 43006459099 is a prime.

It is a super-2 number, since 2×43040013531² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (43040013931) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 135345796 + ... + 135346113.

It is an arithmetic number, because the mean of its divisors is an integer number (7308681570).

Almost surely, 2^43040013531 is an apocalyptic number.

43040013531 is a deficient number, since it is larger than the sum of its proper divisors (15429439029).

43040013531 is a wasteful number, since it uses less digits than its factorization.

43040013531 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 270691965.

The product of its (nonzero) digits is 2160, while the sum is 24.

Adding to 43040013531 its reverse (13531004034), we get a palindrome (56571017565).

The spelling of 43040013531 in words is "forty-three billion, forty million, thirteen thousand, five hundred thirty-one".