2021003243 has 32 divisors (see below), whose sum is σ = 2519285760. Its totient is φ = 1583930880.

The previous prime is 2021003239. The next prime is 2021003251. The reversal of 2021003243 is 3423001202.

It is not a de Polignac number, because 2021003243 - 2² = 2021003239 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2021003203) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 292355 + ... + 299187.

It is an arithmetic number, because the mean of its divisors is an integer number (78727680).

Almost surely, 2^2021003243 is an apocalyptic number.

2021003243 is a deficient number, since it is larger than the sum of its proper divisors (498282517).

2021003243 is a wasteful number, since it uses less digits than its factorization.

2021003243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6947.

The product of its (nonzero) digits is 288, while the sum is 17.

The square root of 2021003243 is about 44955.5696549382. The cubic root of 2021003243 is about 1264.3161052045.

Adding to 2021003243 its reverse (3423001202), we get a palindrome (5444004445).

The spelling of 2021003243 in words is "two billion, twenty-one million, three thousand, two hundred forty-three".