2153863 has 4 divisors (see below), whose sum is σ = 2157840. Its totient is φ = 2149888.

The previous prime is 2153861. The next prime is 2153873. The reversal of 2153863 is 3683512.

2153863 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 is a cyclic number.

It is not a de Polignac number, because 2153863 - 2¹ = 2153861 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 (2153861) 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 in 3 ways as a sum of consecutive naturals, for example, 1018 + ... + 2311.

It is an arithmetic number, because the mean of its divisors is an integer number (539460).

2^2153863 is an apocalyptic number.

2153863 is a deficient number, since it is larger than the sum of its proper divisors (3977).

2153863 is an equidigital number, since it uses as much as digits as its factorization.

2153863 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3976.

The product of its digits is 4320, while the sum is 28.

The square root of 2153863 is about 1467.6045107589. The cubic root of 2153863 is about 129.1435415185.

The spelling of 2153863 in words is "two million, one hundred fifty-three thousand, eight hundred sixty-three".