40036531 has 4 divisors (see below), whose sum is σ = 41328064. Its totient is φ = 38745000.

The previous prime is 40036517. The next prime is 40036543. The reversal of 40036531 is 13563004.

40036531 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a cyclic number.

It is not a de Polignac number, because 40036531 - 2⁹ = 40036019 is a prime.

It is a super-2 number, since 2×40036531² = 3205847629027922, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (40031531) 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 3 ways as a sum of consecutive naturals, for example, 645720 + ... + 645781.

It is an arithmetic number, because the mean of its divisors is an integer number (10332016).

Almost surely, 2^40036531 is an apocalyptic number.

40036531 is a deficient number, since it is larger than the sum of its proper divisors (1291533).

40036531 is a wasteful number, since it uses less digits than its factorization.

40036531 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1291532.

The product of its (nonzero) digits is 1080, while the sum is 22.

The square root of 40036531 is about 6327.4426903766. The cubic root of 40036531 is about 342.0992695427.

Adding to 40036531 its reverse (13563004), we get a palindrome (53599535).

The spelling of 40036531 in words is "forty million, thirty-six thousand, five hundred thirty-one".