2187563 has 4 divisors (see below), whose sum is σ = 2500080. Its totient is φ = 1875048.

The previous prime is 2187529. The next prime is 2187571. The reversal of 2187563 is 3657812.

It is a happy number.

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

It is not a de Polignac number, because 2187563 - 2²⁰ = 1138987 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2187583) 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, 156248 + ... + 156261.

It is an arithmetic number, because the mean of its divisors is an integer number (625020).

2^2187563 is an apocalyptic number.

2187563 is a deficient number, since it is larger than the sum of its proper divisors (312517).

2187563 is an equidigital number, since it uses as much as digits as its factorization.

2187563 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 312516.

The product of its digits is 10080, while the sum is 32.

The square root of 2187563 is about 1479.0412435088. The cubic root of 2187563 is about 129.8135987329.

The spelling of 2187563 in words is "two million, one hundred eighty-seven thousand, five hundred sixty-three".