40040225 has 6 divisors (see below), whose sum is σ = 49649910. Its totient is φ = 32032160.

The previous prime is 40040197. The next prime is 40040227. The reversal of 40040225 is 52204004.

40040225 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 3 ways, for example, as 7333264 + 32706961 = 2708^2 + 5719^2 .

It is not a de Polignac number, because 40040225 - 2²⁰ = 38991649 is a prime.

It is not an unprimeable number, because it can be changed into a prime (40040227) 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 5 ways as a sum of consecutive naturals, for example, 800780 + ... + 800829.

It is an arithmetic number, because the mean of its divisors is an integer number (8274985).

Almost surely, 2^40040225 is an apocalyptic number.

It is an amenable number.

40040225 is a deficient number, since it is larger than the sum of its proper divisors (9609685).

40040225 is a wasteful number, since it uses less digits than its factorization.

40040225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1601619 (or 1601614 counting only the distinct ones).

The product of its (nonzero) digits is 320, while the sum is 17.

The square root of 40040225 is about 6327.7345867222. The cubic root of 40040225 is about 342.1097905661.

Adding to 40040225 its reverse (52204004), we get a palindrome (92244229).

The spelling of 40040225 in words is "forty million, forty thousand, two hundred twenty-five".