2051563 has 6 divisors (see below), whose sum is σ = 2165604. Its totient is φ = 1943244.

The previous prime is 2051537. The next prime is 2051587. The reversal of 2051563 is 3651502.

It is a happy number.

It is not a de Polignac number, because 2051563 - 2⁹ = 2051051 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2051593) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2481 + ... + 3202.

It is an arithmetic number, because the mean of its divisors is an integer number (360934).

2^2051563 is an apocalyptic number.

2051563 is a deficient number, since it is larger than the sum of its proper divisors (114041).

2051563 is an equidigital number, since it uses as much as digits as its factorization.

2051563 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5721 (or 5702 counting only the distinct ones).

The product of its (nonzero) digits is 900, while the sum is 22.

The square root of 2051563 is about 1432.3278256042. The cubic root of 2051563 is about 127.0656861518.

The spelling of 2051563 in words is "two million, fifty-one thousand, five hundred sixty-three".