40531685 has 4 divisors (see below), whose sum is σ = 48638028. Its totient is φ = 32425344.

The previous prime is 40531619. The next prime is 40531691. The reversal of 40531685 is 58613504.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 19307236 + 21224449 = 4394^2 + 4607^2 .

It is a cyclic number.

It is not a de Polignac number, because 40531685 - 2⁸ = 40531429 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4053164 + ... + 4053173.

It is an arithmetic number, because the mean of its divisors is an integer number (12159507).

Almost surely, 2^40531685 is an apocalyptic number.

It is an amenable number.

40531685 is a deficient number, since it is larger than the sum of its proper divisors (8106343).

40531685 is an equidigital number, since it uses as much as digits as its factorization.

40531685 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8106342.

The product of its (nonzero) digits is 14400, while the sum is 32.

The square root of 40531685 is about 6366.4499526816. The cubic root of 40531685 is about 343.5038056456.

The spelling of 40531685 in words is "forty million, five hundred thirty-one thousand, six hundred eighty-five".