2188651 has 2 divisors, whose sum is σ = 2188652. Its totient is φ = 2188650.

The previous prime is 2188639. The next prime is 2188663. The reversal of 2188651 is 1568812.

2188651 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a balanced prime because it is at equal distance from previous prime (2188639) and next prime (2188663).

It is a cyclic number.

It is not a de Polignac number, because 2188651 - 2¹¹ = 2186603 is a prime.

It is a Chen prime.

2188651 is a lucky number.

It is not a weakly prime, because it can be changed into another prime (2188691) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1094325 + 1094326.

It is an arithmetic number, because the mean of its divisors is an integer number (1094326).

2^2188651 is an apocalyptic number.

2188651 is a deficient number, since it is larger than the sum of its proper divisors (1).

2188651 is an equidigital number, since it uses as much as digits as its factorization.

2188651 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3840, while the sum is 31.

The square root of 2188651 is about 1479.4090036227. The cubic root of 2188651 is about 129.8351164045.

The spelling of 2188651 in words is "two million, one hundred eighty-eight thousand, six hundred fifty-one".