2215204420 has 96 divisors (see below), whose sum is σ = 5481778176. Its totient is φ = 741312000.

The previous prime is 2215204403. The next prime is 2215204441. The reversal of 2215204420 is 244025122.

It is a Harshad number since it is a multiple of its sum of digits (22).

It is a junction number, because it is equal to n+sod(n) for n = 2215204391 and 2215204400.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1134445 + ... + 1136395.

It is an arithmetic number, because the mean of its divisors is an integer number (57101856).

Almost surely, 2^2215204420 is an apocalyptic number.

2215204420 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 2215204420, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2740889088).

2215204420 is an abundant number, since it is smaller than the sum of its proper divisors (3266573756).

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

2215204420 is a wasteful number, since it uses less digits than its factorization.

2215204420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2381 (or 2379 counting only the distinct ones).

The product of its (nonzero) digits is 1280, while the sum is 22.

The square root of 2215204420 is about 47065.9581863580. The cubic root of 2215204420 is about 1303.5807434647.

Adding to 2215204420 its reverse (244025122), we get a palindrome (2459229542).

The spelling of 2215204420 in words is "two billion, two hundred fifteen million, two hundred four thousand, four hundred twenty".