2188871 has 2 divisors, whose sum is σ = 2188872. Its totient is φ = 2188870.

The previous prime is 2188861. The next prime is 2188873. The reversal of 2188871 is 1788812.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 2188871 - 2⁶ = 2188807 is a prime.

Together with 2188873, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2188873) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1094435 + 1094436.

It is an arithmetic number, because the mean of its divisors is an integer number (1094436).

2^2188871 is an apocalyptic number.

2188871 is a deficient number, since it is larger than the sum of its proper divisors (1).

2188871 is an equidigital number, since it uses as much as digits as its factorization.

2188871 is an evil number, because the sum of its binary digits is even.

The product of its digits is 7168, while the sum is 35.

The square root of 2188871 is about 1479.4833557698. The cubic root of 2188871 is about 129.8394665375.

The spelling of 2188871 in words is "two million, one hundred eighty-eight thousand, eight hundred seventy-one".