255425521 has 8 divisors (see below), whose sum is σ = 275504040. Its totient is φ = 235408512.

The previous prime is 255425519. The next prime is 255425563. The reversal of 255425521 is 125524552.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 703921 + 254721600 = 839^2 + 15960^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 255425521 - 2¹ = 255425519 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (255425021) 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 7 ways as a sum of consecutive naturals, for example, 6556 + ... + 23533.

It is an arithmetic number, because the mean of its divisors is an integer number (34438005).

Almost surely, 2^255425521 is an apocalyptic number.

It is an amenable number.

255425521 is a deficient number, since it is larger than the sum of its proper divisors (20078519).

255425521 is a wasteful number, since it uses less digits than its factorization.

255425521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30755.

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

The square root of 255425521 is about 15982.0374483356. The cubic root of 255425521 is about 634.4851022659.

The spelling of 255425521 in words is "two hundred fifty-five million, four hundred twenty-five thousand, five hundred twenty-one".