25216144 has 20 divisors (see below), whose sum is σ = 50433280. Its totient is φ = 12201120.

The previous prime is 25216127. The next prime is 25216159. The reversal of 25216144 is 44161252.

It is a happy number.

25216144 is an admirable number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 24924 + ... + 25915.

It is an arithmetic number, because the mean of its divisors is an integer number (2521664).

Almost surely, 2^25216144 is an apocalyptic number.

It is an amenable number.

25216144 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

25216144 is a wasteful number, since it uses less digits than its factorization.

25216144 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50878 (or 50872 counting only the distinct ones).

The product of its digits is 1920, while the sum is 25.

The square root of 25216144 is about 5021.5678826438. The cubic root of 25216144 is about 293.2420354071.

Adding to 25216144 its reverse (44161252), we get a palindrome (69377396).

The spelling of 25216144 in words is "twenty-five million, two hundred sixteen thousand, one hundred forty-four".