2805563 has 8 divisors (see below), whose sum is σ = 2946048. Its totient is φ = 2666664.

The previous prime is 2805533. The next prime is 2805577. The reversal of 2805563 is 3655082.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 2805563 - 2¹⁶ = 2740027 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2805533) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4856 + ... + 5402.

It is an arithmetic number, because the mean of its divisors is an integer number (368256).

2^2805563 is an apocalyptic number.

2805563 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

2805563 is a deficient number, since it is larger than the sum of its proper divisors (140485).

2805563 is a wasteful number, since it uses less digits than its factorization.

2805563 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 793.

The product of its (nonzero) digits is 7200, while the sum is 29.

The square root of 2805563 is about 1674.9814924351. The cubic root of 2805563 is about 141.0392560415.

The spelling of 2805563 in words is "two million, eight hundred five thousand, five hundred sixty-three".