2255720220 has 144 divisors (see below), whose sum is σ = 7489958112. Its totient is φ = 546117120.

The previous prime is 2255720189. The next prime is 2255720249. The reversal of 2255720220 is 220275522.

2255720220 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 134839 + ... + 150641.

It is an arithmetic number, because the mean of its divisors is an integer number (52013598).

Almost surely, 2^2255720220 is an apocalyptic number.

2255720220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2255720220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3744979056).

2255720220 is an abundant number, since it is smaller than the sum of its proper divisors (5234237892).

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

2255720220 is a wasteful number, since it uses less digits than its factorization.

2255720220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15892 (or 15887 counting only the distinct ones).

The product of its (nonzero) digits is 5600, while the sum is 27.

The square root of 2255720220 is about 47494.4230410266. The cubic root of 2255720220 is about 1311.4802179262.

Adding to 2255720220 its reverse (220275522), we get a palindrome (2475995742).

The spelling of 2255720220 in words is "two billion, two hundred fifty-five million, seven hundred twenty thousand, two hundred twenty".