2221531200 has 252 divisors, whose sum is σ = 9024233920. Its totient is φ = 507755520.

The previous prime is 2221531183. The next prime is 2221531211. The reversal of 2221531200 is 21351222.

It is a tau number, because it is divible by the number of its divisors (252).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 89781 + ... + 111819.

Almost surely, 2^2221531200 is an apocalyptic number.

2221531200 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 2221531200, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4512116960).

2221531200 is an abundant number, since it is smaller than the sum of its proper divisors (6802702720).

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

2221531200 is a wasteful number, since it uses less digits than its factorization.

2221531200 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22074 (or 22056 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 18.

The square root of 2221531200 is about 47133.1221117379. The cubic root of 2221531200 is about 1304.8206033399.

Adding to 2221531200 its reverse (21351222), we get a palindrome (2242882422).

The spelling of 2221531200 in words is "two billion, two hundred twenty-one million, five hundred thirty-one thousand, two hundred".