25782217 has 8 divisors (see below), whose sum is σ = 27343872. Its totient is φ = 24225600.

The previous prime is 25782209. The next prime is 25782223. The reversal of 25782217 is 71228752.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 25782217 - 2³ = 25782209 is a prime.

It is a Duffinian number.

It is a nialpdrome in base 12.

It is not an unprimeable number, because it can be changed into a prime (25782227) 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 7 ways as a sum of consecutive naturals, for example, 16792 + ... + 18262.

It is an arithmetic number, because the mean of its divisors is an integer number (3417984).

Almost surely, 2^25782217 is an apocalyptic number.

It is an amenable number.

25782217 is a deficient number, since it is larger than the sum of its proper divisors (1561655).

25782217 is a wasteful number, since it uses less digits than its factorization.

25782217 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2519.

The product of its digits is 15680, while the sum is 34.

The square root of 25782217 is about 5077.6192255820. The cubic root of 25782217 is about 295.4201310520.

The spelling of 25782217 in words is "twenty-five million, seven hundred eighty-two thousand, two hundred seventeen".