40543531 has 12 divisors (see below), whose sum is σ = 47601840. Its totient is φ = 34428240.

The previous prime is 40543513. The next prime is 40543541. The reversal of 40543531 is 13534504.

40543531 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 40543531 - 2⁷ = 40543403 is a prime.

It is a super-2 number, since 2×40543531² = 3287555811895922, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 40543496 and 40543505.

It is not an unprimeable number, because it can be changed into a prime (40543541) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1546 + ... + 9136.

It is an arithmetic number, because the mean of its divisors is an integer number (3966820).

Almost surely, 2^40543531 is an apocalyptic number.

40543531 is a deficient number, since it is larger than the sum of its proper divisors (7058309).

40543531 is a wasteful number, since it uses less digits than its factorization.

40543531 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7714 (or 7707 counting only the distinct ones).

The product of its (nonzero) digits is 3600, while the sum is 25.

The square root of 40543531 is about 6367.3802305187. The cubic root of 40543531 is about 343.5372671192.

The spelling of 40543531 in words is "forty million, five hundred forty-three thousand, five hundred thirty-one".