2021253200 has 60 divisors (see below), whose sum is σ = 4922653308. Its totient is φ = 797414400.

The previous prime is 2021253161. The next prime is 2021253217. The reversal of 2021253200 is 23521202.

It can be written as a sum of positive squares in 6 ways, for example, as 43138624 + 1978114576 = 6568^2 + 44476^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 5411 + ... + 63810.

Almost surely, 2^2021253200 is an apocalyptic number.

2021253200 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 2021253200, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2461326654).

2021253200 is an abundant number, since it is smaller than the sum of its proper divisors (2901400108).

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

2021253200 is a wasteful number, since it uses less digits than its factorization.

2021253200 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 69312 (or 69301 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 17.

The square root of 2021253200 is about 44958.3496138370. The cubic root of 2021253200 is about 1264.3682264524.

Adding to 2021253200 its reverse (23521202), we get a palindrome (2044774402).

The spelling of 2021253200 in words is "two billion, twenty-one million, two hundred fifty-three thousand, two hundred".