2215861200 has 180 divisors, whose sum is σ = 8788275808. Its totient is φ = 506476800.

The previous prime is 2215861189. The next prime is 2215861237. The reversal of 2215861200 is 21685122.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (180).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 18766 + ... + 69165.

Almost surely, 2^2215861200 is an apocalyptic number.

2215861200 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 2215861200, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4394137904).

2215861200 is an abundant number, since it is smaller than the sum of its proper divisors (6572414608).

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

2215861200 is a wasteful number, since it uses less digits than its factorization.

2215861200 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 87962 (or 87948 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 27.

The square root of 2215861200 is about 47072.9348989417. The cubic root of 2215861200 is about 1303.7095624506.

The spelling of 2215861200 in words is "two billion, two hundred fifteen million, eight hundred sixty-one thousand, two hundred".