255420403 has 4 divisors (see below), whose sum is σ = 291909040. Its totient is φ = 218931768.

The previous prime is 255420397. The next prime is 255420413. The reversal of 255420403 is 304024552.

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 255420403 - 2²⁵ = 221865971 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (255420413) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 18244308 + ... + 18244321.

It is an arithmetic number, because the mean of its divisors is an integer number (72977260).

Almost surely, 2^255420403 is an apocalyptic number.

255420403 is a deficient number, since it is larger than the sum of its proper divisors (36488637).

255420403 is an equidigital number, since it uses as much as digits as its factorization.

255420403 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36488636.

The product of its (nonzero) digits is 4800, while the sum is 25.

The square root of 255420403 is about 15981.8773302763. The cubic root of 255420403 is about 634.4808644795.

Adding to 255420403 its reverse (304024552), we get a palindrome (559444955).

The spelling of 255420403 in words is "two hundred fifty-five million, four hundred twenty thousand, four hundred three".