43545423531 has 16 divisors (see below), whose sum is σ = 60010320384. Its totient is φ = 28070288544.

The previous prime is 43545423527. The next prime is 43545423533. The reversal of 43545423531 is 13532454534.

It is not a de Polignac number, because 43545423531 - 2² = 43545423527 is a prime.

It is a super-2 number, since 2×43545423531² (a number of 22 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 43545423531.

It is not an unprimeable number, because it can be changed into a prime (43545423533) 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 15 ways as a sum of consecutive naturals, for example, 1848736 + ... + 1872141.

It is an arithmetic number, because the mean of its divisors is an integer number (3750645024).

Almost surely, 2^43545423531 is an apocalyptic number.

43545423531 is a deficient number, since it is larger than the sum of its proper divisors (16464896853).

43545423531 is a wasteful number, since it uses less digits than its factorization.

43545423531 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3721010.

The product of its digits is 432000, while the sum is 39.

The spelling of 43545423531 in words is "forty-three billion, five hundred forty-five million, four hundred twenty-three thousand, five hundred thirty-one".