2123563 has 4 divisors (see below), whose sum is σ = 2286928. Its totient is φ = 1960200.

The previous prime is 2123557. The next prime is 2123581. The reversal of 2123563 is 3653212.

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 2123563 - 2¹³ = 2115371 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2123063) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 81663 + ... + 81688.

It is an arithmetic number, because the mean of its divisors is an integer number (571732).

2^2123563 is an apocalyptic number.

2123563 is a deficient number, since it is larger than the sum of its proper divisors (163365).

2123563 is a wasteful number, since it uses less digits than its factorization.

2123563 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 163364.

The product of its digits is 1080, while the sum is 22.

The square root of 2123563 is about 1457.2450034226. The cubic root of 2123563 is about 128.5350931420.

Adding to 2123563 its reverse (3653212), we get a palindrome (5776775).

The spelling of 2123563 in words is "two million, one hundred twenty-three thousand, five hundred sixty-three".