255520320 has 112 divisors (see below), whose sum is σ = 885066048. Its totient is φ = 61941760.

The previous prime is 255520301. The next prime is 255520351. The reversal of 255520320 is 23025552.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1539 + ... + 22658.

Almost surely, 2^255520320 is an apocalyptic number.

255520320 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 255520320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (442533024).

255520320 is an abundant number, since it is smaller than the sum of its proper divisors (629545728).

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

255520320 is a wasteful number, since it uses less digits than its factorization.

255520320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24228 (or 24218 counting only the distinct ones).

The product of its (nonzero) digits is 3000, while the sum is 24.

The square root of 255520320 is about 15985.0029715355. The cubic root of 255520320 is about 634.5635871321.

Adding to 255520320 its reverse (23025552), we get a palindrome (278545872).

The spelling of 255520320 in words is "two hundred fifty-five million, five hundred twenty thousand, three hundred twenty".