40636217 has 4 divisors (see below), whose sum is σ = 40649700. Its totient is φ = 40622736.

The previous prime is 40636199. The next prime is 40636229. The reversal of 40636217 is 71263604.

40636217 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, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 20106256 + 20529961 = 4484^2 + 4531^2 .

It is a cyclic number.

It is not a de Polignac number, because 40636217 - 2¹⁰ = 40635193 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 40636217.

It is not an unprimeable number, because it can be changed into a prime (40636417) 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, 83 + ... + 9015.

It is an arithmetic number, because the mean of its divisors is an integer number (10162425).

Almost surely, 2^40636217 is an apocalyptic number.

It is an amenable number.

40636217 is a deficient number, since it is larger than the sum of its proper divisors (13483).

40636217 is an equidigital number, since it uses as much as digits as its factorization.

40636217 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13482.

The product of its (nonzero) digits is 6048, while the sum is 29.

The square root of 40636217 is about 6374.6542651347. The cubic root of 40636217 is about 343.7988531339.

The spelling of 40636217 in words is "forty million, six hundred thirty-six thousand, two hundred seventeen".