211055543987 has 2 divisors, whose sum is σ = 211055543988. Its totient is φ = 211055543986.

The previous prime is 211055543927. The next prime is 211055544061. The reversal of 211055543987 is 789345550112.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 211055543987 - 2²⁰ = 211054495411 is a prime.

It is not a weakly prime, because it can be changed into another prime (211055543927) by changing a digit.

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 as a sum of consecutive naturals, namely, 105527771993 + 105527771994.

It is an arithmetic number, because the mean of its divisors is an integer number (105527771994).

Almost surely, 2^211055543987 is an apocalyptic number.

211055543987 is a deficient number, since it is larger than the sum of its proper divisors (1).

211055543987 is an equidigital number, since it uses as much as digits as its factorization.

211055543987 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1512000, while the sum is 50.

The spelling of 211055543987 in words is "two hundred eleven billion, fifty-five million, five hundred forty-three thousand, nine hundred eighty-seven".