211371871 has 2 divisors, whose sum is σ = 211371872. Its totient is φ = 211371870.

The previous prime is 211371841. The next prime is 211371877. The reversal of 211371871 is 178173112.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-211371871 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (211371877) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105685935 + 105685936.

It is an arithmetic number, because the mean of its divisors is an integer number (105685936).

Almost surely, 2^211371871 is an apocalyptic number.

211371871 is a deficient number, since it is larger than the sum of its proper divisors (1).

211371871 is an equidigital number, since it uses as much as digits as its factorization.

211371871 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2352, while the sum is 31.

The square root of 211371871 is about 14538.6337391104. The cubic root of 211371871 is about 595.6837193631.

It can be divided in two parts, 2113 and 71871, that added together give a square (73984 = 272²).

The spelling of 211371871 in words is "two hundred eleven million, three hundred seventy-one thousand, eight hundred seventy-one".