255053521 has 4 divisors (see below), whose sum is σ = 263848500. Its totient is φ = 246258544.

The previous prime is 255053501. The next prime is 255053531. The reversal of 255053521 is 125350552.

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

It can be written as a sum of positive squares in 2 ways, for example, as 43758225 + 211295296 = 6615^2 + 14536^2 .

It is a cyclic number.

It is not a de Polignac number, because 255053521 - 2⁹ = 255053009 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 255053521.

It is not an unprimeable number, because it can be changed into a prime (255053501) by changing a digit.

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, 4397446 + ... + 4397503.

It is an arithmetic number, because the mean of its divisors is an integer number (65962125).

Almost surely, 2^255053521 is an apocalyptic number.

It is an amenable number.

255053521 is a deficient number, since it is larger than the sum of its proper divisors (8794979).

255053521 is an equidigital number, since it uses as much as digits as its factorization.

255053521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8794978.

The product of its (nonzero) digits is 7500, while the sum is 28.

The square root of 255053521 is about 15970.3951422624. The cubic root of 255053521 is about 634.1769326759.

The spelling of 255053521 in words is "two hundred fifty-five million, fifty-three thousand, five hundred twenty-one".