2021428224 has 110 divisors (see below), whose sum is σ = 6036627564. Its totient is φ = 673781760.

The previous prime is 2021428219. The next prime is 2021428273. The reversal of 2021428224 is 4228241202.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is an unprimeable number.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 70759 + ... + 95129.

Almost surely, 2^2021428224 is an apocalyptic number.

2021428224 is a gapful number since it is divisible by the number (24) 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 2021428224, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3018313782).

2021428224 is an abundant number, since it is smaller than the sum of its proper divisors (4015199340).

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

2021428224 is an equidigital number, since it uses as much as digits as its factorization.

2021428224 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24403 (or 24376 counting only the distinct ones).

The product of its (nonzero) digits is 4096, while the sum is 27.

The square root of 2021428224 is about 44960.2960844343. The cubic root of 2021428224 is about 1264.4047200491.

Adding to 2021428224 its reverse (4228241202), we get a palindrome (6249669426).

The spelling of 2021428224 in words is "two billion, twenty-one million, four hundred twenty-eight thousand, two hundred twenty-four".