255500017 has 4 divisors (see below), whose sum is σ = 256059556. Its totient is φ = 254940480.

The previous prime is 255499999. The next prime is 255500039. The reversal of 255500017 is 710005552.

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 229855921 + 25644096 = 15161^2 + 5064^2 .

It is a cyclic number.

It is not a de Polignac number, because 255500017 - 2¹⁹ = 254975729 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 255499964 and 255500000.

It is not an unprimeable number, because it can be changed into a prime (255500117) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 279084 + ... + 279997.

It is an arithmetic number, because the mean of its divisors is an integer number (64014889).

Almost surely, 2^255500017 is an apocalyptic number.

It is an amenable number.

255500017 is a deficient number, since it is larger than the sum of its proper divisors (559539).

255500017 is an equidigital number, since it uses as much as digits as its factorization.

255500017 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 559538.

The product of its (nonzero) digits is 1750, while the sum is 25.

The square root of 255500017 is about 15984.3678949153. The cubic root of 255500017 is about 634.5467797464.

Adding to 255500017 its reverse (710005552), we get a palindrome (965505569).

The spelling of 255500017 in words is "two hundred fifty-five million, five hundred thousand, seventeen".