25918163 has 4 divisors (see below), whose sum is σ = 26052648. Its totient is φ = 25783680.

The previous prime is 25918157. The next prime is 25918231. The reversal of 25918163 is 36181952.

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 25918163 - 2⁶ = 25918099 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25918133) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 66953 + ... + 67338.

It is an arithmetic number, because the mean of its divisors is an integer number (6513162).

Almost surely, 2^25918163 is an apocalyptic number.

25918163 is a deficient number, since it is larger than the sum of its proper divisors (134485).

25918163 is a wasteful number, since it uses less digits than its factorization.

25918163 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 134484.

The product of its digits is 12960, while the sum is 35.

The square root of 25918163 is about 5090.9884109080. The cubic root of 25918163 is about 295.9384573477.

The spelling of 25918163 in words is "twenty-five million, nine hundred eighteen thousand, one hundred sixty-three".