255204220 has 24 divisors (see below), whose sum is σ = 539532000. Its totient is φ = 101395392.

The previous prime is 255204217. The next prime is 255204293. The reversal of 255204220 is 22402552.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 255204191 and 255204200.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 39840 + ... + 45799.

It is an arithmetic number, because the mean of its divisors is an integer number (22480500).

Almost surely, 2^255204220 is an apocalyptic number.

255204220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

255204220 is an abundant number, since it is smaller than the sum of its proper divisors (284327780).

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

255204220 is a wasteful number, since it uses less digits than its factorization.

255204220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 85797 (or 85795 counting only the distinct ones).

The product of its (nonzero) digits is 1600, while the sum is 22.

The square root of 255204220 is about 15975.1125191656. The cubic root of 255204220 is about 634.3018097511.

Adding to 255204220 its reverse (22402552), we get a palindrome (277606772).

The spelling of 255204220 in words is "two hundred fifty-five million, two hundred four thousand, two hundred twenty".