255621328 has 10 divisors (see below), whose sum is σ = 495266354. Its totient is φ = 127810656.

The previous prime is 255621251. The next prime is 255621329. The reversal of 255621328 is 823126552.

It can be written as a sum of positive squares in only one way, i.e., 255616144 + 5184 = 15988^2 + 72^2 .

It is a junction number, because it is equal to n+sod(n) for n = 255621293 and 255621302.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (255621329) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7988151 + ... + 7988182.

Almost surely, 2^255621328 is an apocalyptic number.

It is an amenable number.

255621328 is a deficient number, since it is larger than the sum of its proper divisors (239645026).

255621328 is a wasteful number, since it uses less digits than its factorization.

255621328 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15976341 (or 15976335 counting only the distinct ones).

The product of its digits is 28800, while the sum is 34.

The square root of 255621328 is about 15988.1621207692. The cubic root of 255621328 is about 634.6471911222.

The spelling of 255621328 in words is "two hundred fifty-five million, six hundred twenty-one thousand, three hundred twenty-eight".