2243221020 has 96 divisors (see below), whose sum is σ = 6989552640. Its totient is φ = 597280320.

The previous prime is 2243221007. The next prime is 2243221061. The reversal of 2243221020 is 201223422.

2243221020 is a `hidden beast` number, since 2 + 2 + 432 + 210 + 20 = 666.

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

It is a junction number, because it is equal to n+sod(n) for n = 2243220984 and 2243221002.

It is a congruent number.

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, 398425 + ... + 404015.

It is an arithmetic number, because the mean of its divisors is an integer number (72807840).

Almost surely, 2^2243221020 is an apocalyptic number.

2243221020 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 2243221020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3494776320).

2243221020 is an abundant number, since it is smaller than the sum of its proper divisors (4746331620).

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

2243221020 is a wasteful number, since it uses less digits than its factorization.

2243221020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6352 (or 6344 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 18.

The square root of 2243221020 is about 47362.6542752832. The cubic root of 2243221020 is about 1309.0533766859.

Adding to 2243221020 its reverse (201223422), we get a palindrome (2444444442).

The spelling of 2243221020 in words is "two billion, two hundred forty-three million, two hundred twenty-one thousand, twenty".