25217163 has 10 divisors (see below), whose sum is σ = 37670204. Its totient is φ = 16811388.

The previous prime is 25217149. The next prime is 25217189. The reversal of 25217163 is 36171252.

It is a happy number.

It is not a de Polignac number, because 25217163 - 2⁴ = 25217147 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25217113) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 155581 + ... + 155742.

Almost surely, 2^25217163 is an apocalyptic number.

25217163 is a deficient number, since it is larger than the sum of its proper divisors (12453041).

25217163 is an equidigital number, since it uses as much as digits as its factorization.

25217163 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 311335 (or 311326 counting only the distinct ones).

The product of its digits is 2520, while the sum is 27.

The square root of 25217163 is about 5021.6693439533. The cubic root of 25217163 is about 293.2459853847.

The spelling of 25217163 in words is "twenty-five million, two hundred seventeen thousand, one hundred sixty-three".