25225216 has 48 divisors (see below), whose sum is σ = 51351300. Its totient is φ = 12386304.

The previous prime is 25225201. The next prime is 25225237. The reversal of 25225216 is 61252252.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 23970816 + 1254400 = 4896^2 + 1120^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 223176 + ... + 223288.

Almost surely, 2^25225216 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 25225216, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (25675650).

25225216 is an abundant number, since it is smaller than the sum of its proper divisors (26126084).

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

25225216 is a wasteful number, since it uses less digits than its factorization.

25225216 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 244 (or 224 counting only the distinct ones).

The product of its digits is 2400, while the sum is 25.

The square root of 25225216 is about 5022.4711049443. The cubic root of 25225216 is about 293.2771977060.

Adding to 25225216 its reverse (61252252), we get a palindrome (86477468).

The spelling of 25225216 in words is "twenty-five million, two hundred twenty-five thousand, two hundred sixteen".