25351216 has 80 divisors (see below), whose sum is σ = 58523040. Its totient is φ = 10506240.

The previous prime is 25351213. The next prime is 25351219. The reversal of 25351216 is 61215352.

It is an interprime number because it is at equal distance from previous prime (25351213) and next prime (25351219).

It is not an unprimeable number, because it can be changed into a prime (25351213) 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, 110590 + ... + 110818.

It is an arithmetic number, because the mean of its divisors is an integer number (731538).

Almost surely, 2^25351216 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 25351216, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (29261520).

25351216 is an abundant number, since it is smaller than the sum of its proper divisors (33171824).

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

25351216 is a wasteful number, since it uses less digits than its factorization.

25351216 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 302 (or 296 counting only the distinct ones).

The product of its digits is 1800, while the sum is 25.

The square root of 25351216 is about 5034.9991062561. Note that the first 3 decimals coincide. The cubic root of 25351216 is about 293.7646936365.

Adding to 25351216 its reverse (61215352), we get a palindrome (86566568).

The spelling of 25351216 in words is "twenty-five million, three hundred fifty-one thousand, two hundred sixteen".