25511216 has 10 divisors (see below), whose sum is σ = 49428012. Its totient is φ = 12755600.

The previous prime is 25511207. The next prime is 25511231. The reversal of 25511216 is 61211552.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 25511191 and 25511200.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 797210 + ... + 797241.

Almost surely, 2^25511216 is an apocalyptic number.

It is an amenable number.

25511216 is a deficient number, since it is larger than the sum of its proper divisors (23916796).

25511216 is a wasteful number, since it uses less digits than its factorization.

25511216 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1594459 (or 1594453 counting only the distinct ones).

The product of its digits is 600, while the sum is 23.

The square root of 25511216 is about 5050.8628965752. The cubic root of 25511216 is about 294.3814137408.

Adding to 25511216 its reverse (61211552), we get a palindrome (86722768).

The spelling of 25511216 in words is "twenty-five million, five hundred eleven thousand, two hundred sixteen".