211678871 has 2 divisors, whose sum is σ = 211678872. Its totient is φ = 211678870.

The previous prime is 211678853. The next prime is 211678919. The reversal of 211678871 is 178876112.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 211678871 - 2⁶ = 211678807 is a prime.

It is a super-3 number, since 3×211678871³ (a number of 26 digits) contains 333 as substring.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (211671871) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105839435 + 105839436.

It is an arithmetic number, because the mean of its divisors is an integer number (105839436).

Almost surely, 2^211678871 is an apocalyptic number.

211678871 is a deficient number, since it is larger than the sum of its proper divisors (1).

211678871 is an equidigital number, since it uses as much as digits as its factorization.

211678871 is an evil number, because the sum of its binary digits is even.

The product of its digits is 37632, while the sum is 41.

The square root of 211678871 is about 14549.1879842141. The cubic root of 211678871 is about 595.9719734805.

The spelling of 211678871 in words is "two hundred eleven million, six hundred seventy-eight thousand, eight hundred seventy-one".