25516563 has 12 divisors (see below), whose sum is σ = 35908488. Its totient is φ = 16115040.

The previous prime is 25516553. The next prime is 25516571. The reversal of 25516563 is 36561552.

It is not a de Polignac number, because 25516563 - 2⁸ = 25516307 is a prime.

It is a nialpdrome in base 12.

It is not an unprimeable number, because it can be changed into a prime (25516553) 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 in 11 ways as a sum of consecutive naturals, for example, 10698 + ... + 12863.

It is an arithmetic number, because the mean of its divisors is an integer number (2992374).

Almost surely, 2^25516563 is an apocalyptic number.

25516563 is a deficient number, since it is larger than the sum of its proper divisors (10391925).

25516563 is a wasteful number, since it uses less digits than its factorization.

25516563 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23602 (or 23583 counting only the distinct ones).

The product of its digits is 27000, while the sum is 33.

The square root of 25516563 is about 5051.3921843389. The cubic root of 25516563 is about 294.4019791718.

The spelling of 25516563 in words is "twenty-five million, five hundred sixteen thousand, five hundred sixty-three".