2159863 has 12 divisors (see below), whose sum is σ = 2365248. Its totient is φ = 1969920.

The previous prime is 2159831. The next prime is 2159881. The reversal of 2159863 is 3689512.

It is not a de Polignac number, because 2159863 - 2⁵ = 2159831 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2159893) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 11095 + ... + 11287.

It is an arithmetic number, because the mean of its divisors is an integer number (197104).

2^2159863 is an apocalyptic number.

2159863 is a deficient number, since it is larger than the sum of its proper divisors (205385).

2159863 is a wasteful number, since it uses less digits than its factorization.

2159863 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 262 (or 243 counting only the distinct ones).

The product of its digits is 12960, while the sum is 34.

The square root of 2159863 is about 1469.6472365843. The cubic root of 2159863 is about 129.2633484038.

The spelling of 2159863 in words is "two million, one hundred fifty-nine thousand, eight hundred sixty-three".