255500403 has 4 divisors (see below), whose sum is σ = 340667208. Its totient is φ = 170333600.

The previous prime is 255500393. The next prime is 255500417. The reversal of 255500403 is 304005552.

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

It is a cyclic number.

It is not a de Polignac number, because 255500403 - 2⁶ = 255500339 is a prime.

It is not an unprimeable number, because it can be changed into a prime (255500303) 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, 42583398 + ... + 42583403.

It is an arithmetic number, because the mean of its divisors is an integer number (85166802).

Almost surely, 2^255500403 is an apocalyptic number.

255500403 is a deficient number, since it is larger than the sum of its proper divisors (85166805).

255500403 is an equidigital number, since it uses as much as digits as its factorization.

255500403 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 85166804.

The product of its (nonzero) digits is 3000, while the sum is 24.

The square root of 255500403 is about 15984.3799692074. The cubic root of 255500403 is about 634.5470992962.

Adding to 255500403 its reverse (304005552), we get a palindrome (559505955).

The spelling of 255500403 in words is "two hundred fifty-five million, five hundred thousand, four hundred three".