2197885 has 4 divisors (see below), whose sum is σ = 2637468. Its totient is φ = 1758304.

The previous prime is 2197873. The next prime is 2197907. The reversal of 2197885 is 5887912.

2197885 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 502681 + 1695204 = 709^2 + 1302^2 .

It is a cyclic number.

It is not a de Polignac number, because 2197885 - 2¹⁵ = 2165117 is a prime.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

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 in 3 ways as a sum of consecutive naturals, for example, 219784 + ... + 219793.

It is an arithmetic number, because the mean of its divisors is an integer number (659367).

2^2197885 is an apocalyptic number.

It is an amenable number.

2197885 is a deficient number, since it is larger than the sum of its proper divisors (439583).

2197885 is an equidigital number, since it uses as much as digits as its factorization.

2197885 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 439582.

The product of its digits is 40320, while the sum is 40.

The square root of 2197885 is about 1482.5265596272. The cubic root of 2197885 is about 130.0174532780.

The spelling of 2197885 in words is "two million, one hundred ninety-seven thousand, eight hundred eighty-five".