2188001 has 2 divisors, whose sum is σ = 2188002. Its totient is φ = 2188000.

The previous prime is 2187979. The next prime is 2188031. The reversal of 2188001 is 1008812.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1157776 + 1030225 = 1076^2 + 1015^2 .

It is a cyclic number.

It is not a de Polignac number, because 2188001 - 2¹⁸ = 1925857 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (2188031) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1094000 + 1094001.

It is an arithmetic number, because the mean of its divisors is an integer number (1094001).

2^2188001 is an apocalyptic number.

It is an amenable number.

2188001 is a deficient number, since it is larger than the sum of its proper divisors (1).

2188001 is an equidigital number, since it uses as much as digits as its factorization.

2188001 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 128, while the sum is 20.

The square root of 2188001 is about 1479.1893049911. The cubic root of 2188001 is about 129.8222620357.

The spelling of 2188001 in words is "two million, one hundred eighty-eight thousand, one".