255200009 has 4 divisors (see below), whose sum is σ = 255836820. Its totient is φ = 254563200.

The previous prime is 255199999. The next prime is 255200021. The reversal of 255200009 is 900002552.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 214915600 + 40284409 = 14660^2 + 6347^2 .

It is a cyclic number.

It is not a de Polignac number, because 255200009 - 2⁴ = 255199993 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (255200059) 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, 317804 + ... + 318605.

It is an arithmetic number, because the mean of its divisors is an integer number (63959205).

Almost surely, 2^255200009 is an apocalyptic number.

It is an amenable number.

255200009 is a deficient number, since it is larger than the sum of its proper divisors (636811).

255200009 is an equidigital number, since it uses as much as digits as its factorization.

255200009 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 636810.

The product of its (nonzero) digits is 900, while the sum is 23.

The square root of 255200009 is about 15974.9807198632. The cubic root of 255200009 is about 634.2983209640.

The spelling of 255200009 in words is "two hundred fifty-five million, two hundred thousand, nine".