25115216 has 40 divisors (see below), whose sum is σ = 56674944. Its totient is φ = 10558080.

The previous prime is 25115213. The next prime is 25115221. The reversal of 25115216 is 61251152.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 25115191 and 25115200.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25115213) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3821 + ... + 8051.

Almost surely, 2^25115216 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 25115216, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28337472).

25115216 is an abundant number, since it is smaller than the sum of its proper divisors (31559728).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

25115216 is a wasteful number, since it uses less digits than its factorization.

25115216 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4299 (or 4293 counting only the distinct ones).

The product of its digits is 600, while the sum is 23.

The square root of 25115216 is about 5011.5083557747. The cubic root of 25115216 is about 292.8502770323.

Adding to 25115216 its reverse (61251152), we get a palindrome (86366368).

The spelling of 25115216 in words is "twenty-five million, one hundred fifteen thousand, two hundred sixteen".