255921225 has 24 divisors (see below), whose sum is σ = 483570240. Its totient is φ = 116992320.

The previous prime is 255921199. The next prime is 255921229. The reversal of 255921225 is 522129552.

It is not a de Polignac number, because 255921225 - 2⁷ = 255921097 is a prime.

It is not an unprimeable number, because it can be changed into a prime (255921229) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 243210 + ... + 244259.

It is an arithmetic number, because the mean of its divisors is an integer number (20148760).

Almost surely, 2^255921225 is an apocalyptic number.

255921225 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

255921225 is a deficient number, since it is larger than the sum of its proper divisors (227649015).

255921225 is a wasteful number, since it uses less digits than its factorization.

255921225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 487489 (or 487484 counting only the distinct ones).

The product of its digits is 18000, while the sum is 33.

The square root of 255921225 is about 15997.5380918440. The cubic root of 255921225 is about 634.8952851902.

The spelling of 255921225 in words is "two hundred fifty-five million, nine hundred twenty-one thousand, two hundred twenty-five".