255540000 has 120 divisors (see below), whose sum is σ = 838419120. Its totient is φ = 68128000.

The previous prime is 255539993. The next prime is 255540007. The reversal of 255540000 is 45552.

It is an interprime number because it is at equal distance from previous prime (255539993) and next prime (255540007).

It is a tau number, because it is divible by the number of its divisors (120).

It is not an unprimeable number, because it can be changed into a prime (255540007) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 57871 + ... + 62129.

It is an arithmetic number, because the mean of its divisors is an integer number (6986826).

Almost surely, 2^255540000 is an apocalyptic number.

255540000 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 255540000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (419209560).

255540000 is an abundant number, since it is smaller than the sum of its proper divisors (582879120).

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

255540000 is an equidigital number, since it uses as much as digits as its factorization.

255540000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4292 (or 4269 counting only the distinct ones).

The product of its (nonzero) digits is 1000, while the sum is 21.

The square root of 255540000 is about 15985.6185366723. The cubic root of 255540000 is about 634.5798779315.

Adding to 255540000 its reverse (45552), we get a palindrome (255585552).

The spelling of 255540000 in words is "two hundred fifty-five million, five hundred forty thousand".