255221500 has 48 divisors (see below), whose sum is σ = 567979776. Its totient is φ = 100152000.

The previous prime is 255221479. The next prime is 255221503. The reversal of 255221500 is 5122552.

255221500 is digitally balanced in base 3 and base 9, because in such bases it contains all the possibile digits an equal number of times.

255221500 is strictly pandigital in base 9.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (255221503) 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 15 ways as a sum of consecutive naturals, for example, 21685 + ... + 31315.

It is an arithmetic number, because the mean of its divisors is an integer number (11832912).

Almost surely, 2^255221500 is an apocalyptic number.

255221500 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 255221500, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (283989888).

255221500 is an abundant number, since it is smaller than the sum of its proper divisors (312758276).

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

255221500 is a wasteful number, since it uses less digits than its factorization.

255221500 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9703 (or 9691 counting only the distinct ones).

The product of its (nonzero) digits is 1000, while the sum is 22.

The square root of 255221500 is about 15975.6533512717. The cubic root of 255221500 is about 634.3161257212.

The spelling of 255221500 in words is "two hundred fifty-five million, two hundred twenty-one thousand, five hundred".