12511216 has 10 divisors (see below), whose sum is σ = 24240512. Its totient is φ = 6255600.

The previous prime is 12511211. The next prime is 12511229. The reversal of 12511216 is 61211521.

It is a junction number, because it is equal to n+sod(n) for n = 12511193 and 12511202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12511211) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 390960 + ... + 390991.

Almost surely, 2^12511216 is an apocalyptic number.

12511216 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

12511216 is a deficient number, since it is larger than the sum of its proper divisors (11729296).

12511216 is an equidigital number, since it uses as much as digits as its factorization.

12511216 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 781959 (or 781953 counting only the distinct ones).

The product of its digits is 120, while the sum is 19.

The square root of 12511216 is about 3537.1197322115. The cubic root of 12511216 is about 232.1488343437.

Adding to 12511216 its reverse (61211521), we get a palindrome (73722737).

The spelling of 12511216 in words is "twelve million, five hundred eleven thousand, two hundred sixteen".