25216512 has 40 divisors (see below), whose sum is σ = 67182456. Its totient is φ = 8404992.

The previous prime is 25216507. The next prime is 25216567. The reversal of 25216512 is 21561252.

It is a happy number.

It is a super-2 number, since 2×25216512² = 1271744954892288, which contains 22 as substring.

It is a hoax number, since the sum of its digits (24) coincides with the sum of the digits of its distinct prime factors.

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

It is a zygodrome in base 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, 6673 + ... + 9744.

Almost surely, 2^25216512 is an apocalyptic number.

It is an amenable number.

25216512 is an abundant number, since it is smaller than the sum of its proper divisors (41965944).

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

25216512 is an equidigital number, since it uses as much as digits as its factorization.

25216512 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16438 (or 16422 counting only the distinct ones).

The product of its digits is 1200, while the sum is 24.

The square root of 25216512 is about 5021.6045244523. The cubic root of 25216512 is about 293.2434619079.

Adding to 25216512 its reverse (21561252), we get a palindrome (46777764).

The spelling of 25216512 in words is "twenty-five million, two hundred sixteen thousand, five hundred twelve".