2021543675 has 6 divisors (see below), whose sum is σ = 2506714188. Its totient is φ = 1617234920.

The previous prime is 2021543651. The next prime is 2021543677. The reversal of 2021543675 is 5763451202.

It is not a de Polignac number, because 2021543675 - 2¹⁰ = 2021542651 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2021543677) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 40430849 + ... + 40430898.

It is an arithmetic number, because the mean of its divisors is an integer number (417785698).

Almost surely, 2^2021543675 is an apocalyptic number.

2021543675 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

2021543675 is a deficient number, since it is larger than the sum of its proper divisors (485170513).

2021543675 is an equidigital number, since it uses as much as digits as its factorization.

2021543675 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 80861757 (or 80861752 counting only the distinct ones).

The product of its (nonzero) digits is 50400, while the sum is 35.

The square root of 2021543675 is about 44961.5799878074. The cubic root of 2021543675 is about 1264.4287911503.

Adding to 2021543675 its reverse (5763451202), we get a palindrome (7784994877).

The spelling of 2021543675 in words is "two billion, twenty-one million, five hundred forty-three thousand, six hundred seventy-five".