2221813600 has 36 divisors (see below), whose sum is σ = 5424004404. Its totient is φ = 888725120.

The previous prime is 2221813577. The next prime is 2221813609. The reversal of 2221813600 is 63181222.

It is a Harshad number since it is a multiple of its sum of digits (25).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2221813609) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1387834 + ... + 1389433.

It is an arithmetic number, because the mean of its divisors is an integer number (150666789).

Almost surely, 2^2221813600 is an apocalyptic number.

2221813600 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2221813600 is an abundant number, since it is smaller than the sum of its proper divisors (3202190804).

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

2221813600 is a wasteful number, since it uses less digits than its factorization.

2221813600 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2777287 (or 2777274 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 25.

The square root of 2221813600 is about 47136.1177866824. The cubic root of 2221813600 is about 1304.8758903908.

Adding to 2221813600 its reverse (63181222), we get a palindrome (2284994822).

The spelling of 2221813600 in words is "two billion, two hundred twenty-one million, eight hundred thirteen thousand, six hundred".