255800520 has 48 divisors (see below), whose sum is σ = 831352860. Its totient is φ = 68213376.

The previous prime is 255800491. The next prime is 255800521. The reversal of 255800520 is 25008552.

It can be written as a sum of positive squares in 2 ways, for example, as 254913156 + 887364 = 15966^2 + 942^2 .

It is not an unprimeable number, because it can be changed into a prime (255800521) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 354919 + ... + 355638.

Almost surely, 2^255800520 is an apocalyptic number.

255800520 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

255800520 is an abundant number, since it is smaller than the sum of its proper divisors (575552340).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

255800520 is a wasteful number, since it uses less digits than its factorization.

255800520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 710574 (or 710567 counting only the distinct ones).

The product of its (nonzero) digits is 4000, while the sum is 27.

The square root of 255800520 is about 15993.7650351629. The cubic root of 255800520 is about 634.7954535762.

The spelling of 255800520 in words is "two hundred fifty-five million, eight hundred thousand, five hundred twenty".