25216725 has 12 divisors (see below), whose sum is σ = 41691776. Its totient is φ = 13448880.

The previous prime is 25216693. The next prime is 25216727. The reversal of 25216725 is 52761252.

It is not a de Polignac number, because 25216725 - 2⁵ = 25216693 is a prime.

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

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 25216692 and 25216701.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25216727) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 168037 + ... + 168186.

Almost surely, 2^25216725 is an apocalyptic number.

25216725 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

25216725 is a deficient number, since it is larger than the sum of its proper divisors (16475051).

25216725 is a wasteful number, since it uses less digits than its factorization.

25216725 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 336236 (or 336231 counting only the distinct ones).

The product of its digits is 8400, while the sum is 30.

The square root of 25216725 is about 5021.6257327682. The cubic root of 25216725 is about 293.2442875664.

Adding to 25216725 its reverse (52761252), we get a palindrome (77977977).

The spelling of 25216725 in words is "twenty-five million, two hundred sixteen thousand, seven hundred twenty-five".