255221455 has 16 divisors (see below), whose sum is σ = 320635584. Its totient is φ = 194656000.

The previous prime is 255221441. The next prime is 255221467. The reversal of 255221455 is 554122552.

It is a happy number.

It is not a de Polignac number, because 255221455 - 2⁹ = 255220943 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 32955 + ... + 39955.

It is an arithmetic number, because the mean of its divisors is an integer number (20039724).

Almost surely, 2^255221455 is an apocalyptic number.

255221455 is a deficient number, since it is larger than the sum of its proper divisors (65414129).

255221455 is a wasteful number, since it uses less digits than its factorization.

255221455 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7346.

The product of its digits is 20000, while the sum is 31.

The square root of 255221455 is about 15975.6519428786. The cubic root of 255221455 is about 634.3160884408.

The spelling of 255221455 in words is "two hundred fifty-five million, two hundred twenty-one thousand, four hundred fifty-five".