556224251220 has 72 divisors (see below), whose sum is σ = 1840596619680. Its totient is φ = 134842242240.

The previous prime is 556224251203. The next prime is 556224251221. The reversal of 556224251220 is 22152422655.

556224251220 is a `hidden beast` number, since 5 + 5 + 6 + 2 + 2 + 425 + 1 + 220 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (556224251221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 140458690 + ... + 140462649.

It is an arithmetic number, because the mean of its divisors is an integer number (25563841940).

Almost surely, 2^556224251220 is an apocalyptic number.

It is an amenable number.

556224251220 is an abundant number, since it is smaller than the sum of its proper divisors (1284372368460).

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

556224251220 is a wasteful number, since it uses less digits than its factorization.

556224251220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 280921365 (or 280921360 counting only the distinct ones).

The product of its (nonzero) digits is 96000, while the sum is 36.

Adding to 556224251220 its reverse (22152422655), we get a palindrome (578376673875).

The spelling of 556224251220 in words is "five hundred fifty-six billion, two hundred twenty-four million, two hundred fifty-one thousand, two hundred twenty".