25216305 has 16 divisors (see below), whose sum is σ = 41031360. Its totient is φ = 13220288.

The previous prime is 25216291. The next prime is 25216309. The reversal of 25216305 is 50361252.

It is a cyclic number.

It is not a de Polignac number, because 25216305 - 2⁵ = 25216273 is a prime.

It is an alternating number because its digits alternate between even and odd.

It is not an unprimeable number, because it can be changed into a prime (25216309) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 13362 + ... + 15131.

It is an arithmetic number, because the mean of its divisors is an integer number (2564460).

Almost surely, 2^25216305 is an apocalyptic number.

It is an amenable number.

25216305 is a deficient number, since it is larger than the sum of its proper divisors (15815055).

25216305 is a wasteful number, since it uses less digits than its factorization.

25216305 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28560.

The product of its (nonzero) digits is 1800, while the sum is 24.

The square root of 25216305 is about 5021.5839134679. The cubic root of 25216305 is about 293.2426595029.

Adding to 25216305 its reverse (50361252), we get a palindrome (75577557).

The spelling of 25216305 in words is "twenty-five million, two hundred sixteen thousand, three hundred five".