25563803 has 2 divisors, whose sum is σ = 25563804. Its totient is φ = 25563802.

The previous prime is 25563799. The next prime is 25563821. The reversal of 25563803 is 30836552.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 25563803 - 2² = 25563799 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 25563803.

It is not a weakly prime, because it can be changed into another prime (25563893) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12781901 + 12781902.

It is an arithmetic number, because the mean of its divisors is an integer number (12781902).

Almost surely, 2^25563803 is an apocalyptic number.

25563803 is a deficient number, since it is larger than the sum of its proper divisors (1).

25563803 is an equidigital number, since it uses as much as digits as its factorization.

25563803 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 21600, while the sum is 32.

The square root of 25563803 is about 5056.0659608039. The cubic root of 25563803 is about 294.5835471955.

The spelling of 25563803 in words is "twenty-five million, five hundred sixty-three thousand, eight hundred three".