255545520 has 80 divisors (see below), whose sum is σ = 805662720. Its totient is φ = 66986752.

The previous prime is 255545509. The next prime is 255545527. The reversal of 255545520 is 25545552.

255545520 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (80).

It is not an unprimeable number, because it can be changed into a prime (255545527) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5137 + ... + 23183.

It is an arithmetic number, because the mean of its divisors is an integer number (10070784).

Almost surely, 2^255545520 is an apocalyptic number.

255545520 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 255545520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (402831360).

255545520 is an abundant number, since it is smaller than the sum of its proper divisors (550117200).

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

255545520 is a wasteful number, since it uses less digits than its factorization.

255545520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18122 (or 18116 counting only the distinct ones).

The product of its (nonzero) digits is 50000, while the sum is 33.

The square root of 255545520 is about 15985.7911909295. The cubic root of 255545520 is about 634.5844471519.

The spelling of 255545520 in words is "two hundred fifty-five million, five hundred forty-five thousand, five hundred twenty".