25216224 has 48 divisors (see below), whose sum is σ = 72213120. Its totient is φ = 7640960.

The previous prime is 25216223. The next prime is 25216229. The reversal of 25216224 is 42261252.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (48).

It is a super-3 number, since 3×25216224³ (a number of 23 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a junction number, because it is equal to n+sod(n) for n = 25216194 and 25216203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25216223) 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, 10884 + ... + 12995.

It is an arithmetic number, because the mean of its divisors is an integer number (1504440).

Almost surely, 2^25216224 is an apocalyptic number.

25216224 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

25216224 is an abundant number, since it is smaller than the sum of its proper divisors (46996896).

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

25216224 is a wasteful number, since it uses less digits than its factorization.

25216224 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23903 (or 23895 counting only the distinct ones).

The product of its digits is 1920, while the sum is 24.

The square root of 25216224 is about 5021.5758482771. The cubic root of 25216224 is about 293.2423455172.

Adding to 25216224 its reverse (42261252), we get a palindrome (67477476).

The spelling of 25216224 in words is "twenty-five million, two hundred sixteen thousand, two hundred twenty-four".