255404005 has 16 divisors (see below), whose sum is σ = 328966704. Its totient is φ = 189665280.

The previous prime is 255404003. The next prime is 255404089. The reversal of 255404005 is 500404552.

It can be written as a sum of positive squares in 8 ways, for example, as 12574116 + 242829889 = 3546^2 + 15583^2 .

It is not a de Polignac number, because 255404005 - 2¹ = 255404003 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (255404003) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 14376 + ... + 26785.

It is an arithmetic number, because the mean of its divisors is an integer number (20560419).

Almost surely, 2^255404005 is an apocalyptic number.

It is an amenable number.

255404005 is a deficient number, since it is larger than the sum of its proper divisors (73562699).

255404005 is a wasteful number, since it uses less digits than its factorization.

255404005 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41256.

The product of its (nonzero) digits is 4000, while the sum is 25.

The square root of 255404005 is about 15981.3643034630. The cubic root of 255404005 is about 634.4672862900.

Adding to 255404005 its reverse (500404552), we get a palindrome (755808557).

The spelling of 255404005 in words is "two hundred fifty-five million, four hundred four thousand, five".