12225516 has 24 divisors (see below), whose sum is σ = 30204720. Its totient is φ = 3835392.

The previous prime is 12225491. The next prime is 12225527. The reversal of 12225516 is 61552221.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 29761 + ... + 30168.

It is an arithmetic number, because the mean of its divisors is an integer number (1258530).

Almost surely, 2^12225516 is an apocalyptic number.

It is an amenable number.

12225516 is an abundant number, since it is smaller than the sum of its proper divisors (17979204).

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

12225516 is a wasteful number, since it uses less digits than its factorization.

12225516 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 59953 (or 59951 counting only the distinct ones).

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

The square root of 12225516 is about 3496.5005362505. The cubic root of 12225516 is about 230.3681313223.

Adding to 12225516 its reverse (61552221), we get a palindrome (73777737).

The spelling of 12225516 in words is "twelve million, two hundred twenty-five thousand, five hundred sixteen".