255244220 has 96 divisors (see below), whose sum is σ = 674956800. Its totient is φ = 78762240.

The previous prime is 255244211. The next prime is 255244243. The reversal of 255244220 is 22442552.

It is a super-2 number, since 2×255244220² = 130299223686816800, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 255244220.

It is a congruent number.

It is an unprimeable number.

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 31 ways as a sum of consecutive naturals, for example, 164006 + ... + 165554.

It is an arithmetic number, because the mean of its divisors is an integer number (7030800).

Almost surely, 2^255244220 is an apocalyptic number.

255244220 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 255244220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (337478400).

255244220 is an abundant number, since it is smaller than the sum of its proper divisors (419712580).

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

255244220 is a wasteful number, since it uses less digits than its factorization.

255244220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1683 (or 1681 counting only the distinct ones).

The product of its (nonzero) digits is 6400, while the sum is 26.

The square root of 255244220 is about 15976.3644174762. The cubic root of 255244220 is about 634.3349475873.

Adding to 255244220 its reverse (22442552), we get a palindrome (277686772).

The spelling of 255244220 in words is "two hundred fifty-five million, two hundred forty-four thousand, two hundred twenty".