655206222 has 128 divisors (see below), whose sum is σ = 1596672000. Its totient is φ = 176964480.

The previous prime is 655206169. The next prime is 655206229. The reversal of 655206222 is 222602556.

It is a self number, because there is not a number n which added to its sum of digits gives 655206222.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (655206229) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 1563529 + ... + 1563947.

It is an arithmetic number, because the mean of its divisors is an integer number (12474000).

Almost surely, 2^655206222 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 655206222, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (798336000).

655206222 is an abundant number, since it is smaller than the sum of its proper divisors (941465778).

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

655206222 is a wasteful number, since it uses less digits than its factorization.

655206222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 526.

The product of its (nonzero) digits is 14400, while the sum is 30.

The square root of 655206222 is about 25596.9963472279. The cubic root of 655206222 is about 868.5456929150.

Adding to 655206222 its reverse (222602556), we get a palindrome (877808778).

The spelling of 655206222 in words is "six hundred fifty-five million, two hundred six thousand, two hundred twenty-two".