2106563 has 2 divisors, whose sum is σ = 2106564. Its totient is φ = 2106562.

The previous prime is 2106551. The next prime is 2106617. The reversal of 2106563 is 3656012.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2106563 - 2¹² = 2102467 is a prime.

It is a Chen prime.

It is equal to p₁₅₆₂₇₂ and since 2106563 and 156272 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (2106523) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1053281 + 1053282.

It is an arithmetic number, because the mean of its divisors is an integer number (1053282).

2^2106563 is an apocalyptic number.

2106563 is a deficient number, since it is larger than the sum of its proper divisors (1).

2106563 is an equidigital number, since it uses as much as digits as its factorization.

2106563 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1080, while the sum is 23.

The square root of 2106563 is about 1451.4003582747. The cubic root of 2106563 is about 128.1911815930.

The spelling of 2106563 in words is "two million, one hundred six thousand, five hundred sixty-three".