211642300643 has 4 divisors (see below), whose sum is σ = 218940311040. Its totient is φ = 204344290248.

The previous prime is 211642300627. The next prime is 211642300663. The reversal of 211642300643 is 346003246112.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 211642300643 - 2⁴ = 211642300627 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (211642300663) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3649005155 + ... + 3649005212.

It is an arithmetic number, because the mean of its divisors is an integer number (54735077760).

Almost surely, 2^211642300643 is an apocalyptic number.

211642300643 is a deficient number, since it is larger than the sum of its proper divisors (7298010397).

211642300643 is an equidigital number, since it uses as much as digits as its factorization.

211642300643 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7298010396.

The product of its (nonzero) digits is 20736, while the sum is 32.

Adding to 211642300643 its reverse (346003246112), we get a palindrome (557645546755).

The spelling of 211642300643 in words is "two hundred eleven billion, six hundred forty-two million, three hundred thousand, six hundred forty-three".