2118871 has 2 divisors, whose sum is σ = 2118872. Its totient is φ = 2118870.

The previous prime is 2118841. The next prime is 2118877. The reversal of 2118871 is 1788112.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 2118871 - 2⁹ = 2118359 is a prime.

It is a super-2 number, since 2×2118871² = 8979228629282, 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 (2118877) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1059435 + 1059436.

It is an arithmetic number, because the mean of its divisors is an integer number (1059436).

2^2118871 is an apocalyptic number.

2118871 is a deficient number, since it is larger than the sum of its proper divisors (1).

2118871 is an equidigital number, since it uses as much as digits as its factorization.

2118871 is an evil number, because the sum of its binary digits is even.

The product of its digits is 896, while the sum is 28.

The square root of 2118871 is about 1455.6342260334. The cubic root of 2118871 is about 128.4403574902.

It can be divided in two parts, 211 and 8871, that multiplied together give a palindrome (1871781).

The spelling of 2118871 in words is "two million, one hundred eighteen thousand, eight hundred seventy-one".