255442220 has 24 divisors (see below), whose sum is σ = 585195408. Its totient is φ = 92888000.

The previous prime is 255442219. The next prime is 255442249. The reversal of 255442220 is 22244552.

It is a self number, because there is not a number n which added to its sum of digits gives 255442220.

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, 580331 + ... + 580770.

It is an arithmetic number, because the mean of its divisors is an integer number (24383142).

Almost surely, 2^255442220 is an apocalyptic number.

255442220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

255442220 is an abundant number, since it is smaller than the sum of its proper divisors (329753188).

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

255442220 is a wasteful number, since it uses less digits than its factorization.

255442220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1161121 (or 1161119 counting only the distinct ones).

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

The square root of 255442220 is about 15982.5598700584. The cubic root of 255442220 is about 634.4989289133.

Adding to 255442220 its reverse (22244552), we get a palindrome (277686772).

The spelling of 255442220 in words is "two hundred fifty-five million, four hundred forty-two thousand, two hundred twenty".