211000247 has 2 divisors, whose sum is σ = 211000248. Its totient is φ = 211000246.

The previous prime is 211000217. The next prime is 211000313. The reversal of 211000247 is 742000112.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 211000247 - 2¹⁴ = 210983863 is a prime.

It is a super-2 number, since 2×211000247² = 89042208468122018, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (211000217) 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, 105500123 + 105500124.

It is an arithmetic number, because the mean of its divisors is an integer number (105500124).

Almost surely, 2^211000247 is an apocalyptic number.

211000247 is a deficient number, since it is larger than the sum of its proper divisors (1).

211000247 is an equidigital number, since it uses as much as digits as its factorization.

211000247 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 112, while the sum is 17.

The square root of 211000247 is about 14525.8475484221. The cubic root of 211000247 is about 595.3344136164.

Adding to 211000247 its reverse (742000112), we get a palindrome (953000359).

The spelling of 211000247 in words is "two hundred eleven million, two hundred forty-seven", and thus it is an aban number.