2255591820 has 24 divisors (see below), whose sum is σ = 6315657264. Its totient is φ = 601491136.

The previous prime is 2255591813. The next prime is 2255591851. The reversal of 2255591820 is 281955522.

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, 18796539 + ... + 18796658.

It is an arithmetic number, because the mean of its divisors is an integer number (263152386).

Almost surely, 2^2255591820 is an apocalyptic number.

2255591820 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2255591820 is an abundant number, since it is smaller than the sum of its proper divisors (4060065444).

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

2255591820 is a wasteful number, since it uses less digits than its factorization.

2255591820 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37593209 (or 37593207 counting only the distinct ones).

The product of its (nonzero) digits is 72000, while the sum is 39.

The square root of 2255591820 is about 47493.0712841358. The cubic root of 2255591820 is about 1311.4553334490.

The spelling of 2255591820 in words is "two billion, two hundred fifty-five million, five hundred ninety-one thousand, eight hundred twenty".