25106563 has 4 divisors (see below), whose sum is σ = 25518208. Its totient is φ = 24694920.

The previous prime is 25106561. The next prime is 25106567. The reversal of 25106563 is 36560152.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 25106563 - 2¹ = 25106561 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25106561) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 205731 + ... + 205852.

It is an arithmetic number, because the mean of its divisors is an integer number (6379552).

Almost surely, 2^25106563 is an apocalyptic number.

25106563 is a deficient number, since it is larger than the sum of its proper divisors (411645).

25106563 is an equidigital number, since it uses as much as digits as its factorization.

25106563 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 411644.

The product of its (nonzero) digits is 5400, while the sum is 28.

The square root of 25106563 is about 5010.6449684646. The cubic root of 25106563 is about 292.8166410548.

The spelling of 25106563 in words is "twenty-five million, one hundred six thousand, five hundred sixty-three".