655600220 has 24 divisors (see below), whose sum is σ = 1501921008. Its totient is φ = 238400000.

The previous prime is 655600217. The next prime is 655600237. The reversal of 655600220 is 22006556.

It is a happy number.

655600220 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a self number, because there is not a number n which added to its sum of digits gives 655600220.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1489781 + ... + 1490220.

It is an arithmetic number, because the mean of its divisors is an integer number (62580042).

Almost surely, 2^655600220 is an apocalyptic number.

It is an amenable number.

655600220 is an abundant number, since it is smaller than the sum of its proper divisors (846320788).

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

655600220 is a wasteful number, since it uses less digits than its factorization.

655600220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2980021 (or 2980019 counting only the distinct ones).

The product of its (nonzero) digits is 3600, while the sum is 26.

The square root of 655600220 is about 25604.6913670132. The cubic root of 655600220 is about 868.7197534800.

Adding to 655600220 its reverse (22006556), we get a palindrome (677606776).

The spelling of 655600220 in words is "six hundred fifty-five million, six hundred thousand, two hundred twenty".