255220555 has 4 divisors (see below), whose sum is σ = 306264672. Its totient is φ = 204176440.

The previous prime is 255220549. The next prime is 255220571. The reversal of 255220555 is 555022552.

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

It is not a de Polignac number, because 255220555 - 2²³ = 246831947 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 25522051 + ... + 25522060.

It is an arithmetic number, because the mean of its divisors is an integer number (76566168).

Almost surely, 2^255220555 is an apocalyptic number.

255220555 is a deficient number, since it is larger than the sum of its proper divisors (51044117).

255220555 is an equidigital number, since it uses as much as digits as its factorization.

255220555 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51044116.

The product of its (nonzero) digits is 25000, while the sum is 31.

The square root of 255220555 is about 15975.6237749892. The cubic root of 255220555 is about 634.3153428333.

The spelling of 255220555 in words is "two hundred fifty-five million, two hundred twenty thousand, five hundred fifty-five".