2021250000 has 480 divisors, whose sum is σ = 8282791296. Its totient is φ = 420000000.

The previous prime is 2021249999. The next prime is 2021250017. The reversal of 2021250000 is 521202.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 183749995 + ... + 183750005.

Almost surely, 2^2021250000 is an apocalyptic number.

2021250000 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 2021250000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4141395648).

2021250000 is an abundant number, since it is smaller than the sum of its proper divisors (6261541296).

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

2021250000 is an frugal number, since it uses more digits than its factorization.

2021250000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 71 (or 28 counting only the distinct ones).

The product of its (nonzero) digits is 40, while the sum is 12.

The square root of 2021250000 is about 44958.3140253280. The cubic root of 2021250000 is about 1264.3675592128.

Adding to 2021250000 its reverse (521202), we get a palindrome (2021771202).

The spelling of 2021250000 in words is "two billion, twenty-one million, two hundred fifty thousand".