555240220 has 24 divisors (see below), whose sum is σ = 1167189408. Its totient is φ = 221870400.

The previous prime is 555240197. The next prime is 555240221. The reversal of 555240220 is 22042555.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (555240221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6825 + ... + 34015.

It is an arithmetic number, because the mean of its divisors is an integer number (48632892).

Almost surely, 2^555240220 is an apocalyptic number.

It is an amenable number.

555240220 is an abundant number, since it is smaller than the sum of its proper divisors (611949188).

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

555240220 is a wasteful number, since it uses less digits than its factorization.

555240220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28221 (or 28219 counting only the distinct ones).

The product of its (nonzero) digits is 4000, while the sum is 25.

The square root of 555240220 is about 23563.5358127765. The cubic root of 555240220 is about 821.9151251355.

Adding to 555240220 its reverse (22042555), we get a palindrome (577282775).

The spelling of 555240220 in words is "five hundred fifty-five million, two hundred forty thousand, two hundred twenty".