255404009 has 12 divisors (see below), whose sum is σ = 301617792. Its totient is φ = 211850280.

The previous prime is 255404003. The next prime is 255404089. The reversal of 255404009 is 900404552.

It is a happy number.

It is a de Polignac number, because none of the positive numbers 2^k-255404009 is a prime.

It is a Curzon 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 11 ways as a sum of consecutive naturals, for example, 12257 + ... + 25710.

It is an arithmetic number, because the mean of its divisors is an integer number (25134816).

Almost surely, 2^255404009 is an apocalyptic number.

It is an amenable number.

255404009 is a deficient number, since it is larger than the sum of its proper divisors (46213783).

255404009 is an equidigital number, since it uses as much as digits as its factorization.

255404009 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38036 (or 38005 counting only the distinct ones).

The product of its (nonzero) digits is 7200, while the sum is 29.

The square root of 255404009 is about 15981.3644286087. The cubic root of 255404009 is about 634.4672896022.

The spelling of 255404009 in words is "two hundred fifty-five million, four hundred four thousand, nine".