40005255 has 16 divisors (see below), whose sum is σ = 64088064. Its totient is φ = 21309600.

The previous prime is 40005227. The next prime is 40005269. The reversal of 40005255 is 55250004.

40005255 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 40005255 - 2⁸ = 40004999 is a prime.

It is a congruent number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 19530 + ... + 21480.

It is an arithmetic number, because the mean of its divisors is an integer number (4005504).

Almost surely, 2^40005255 is an apocalyptic number.

40005255 is a deficient number, since it is larger than the sum of its proper divisors (24082809).

40005255 is a wasteful number, since it uses less digits than its factorization.

40005255 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3326.

The product of its (nonzero) digits is 1000, while the sum is 21.

The square root of 40005255 is about 6324.9707509205. The cubic root of 40005255 is about 342.0101652189.

Adding to 40005255 its reverse (55250004), we get a palindrome (95255259).

The spelling of 40005255 in words is "forty million, five thousand, two hundred fifty-five".