12223550 has 12 divisors (see below), whose sum is σ = 22735896. Its totient is φ = 4889400.

The previous prime is 12223543. The next prime is 12223553. The reversal of 12223550 is 5532221.

12223550 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12223553) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 122186 + ... + 122285.

It is an arithmetic number, because the mean of its divisors is an integer number (1894658).

Almost surely, 2^12223550 is an apocalyptic number.

12223550 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

12223550 is a deficient number, since it is larger than the sum of its proper divisors (10512346).

12223550 is a wasteful number, since it uses less digits than its factorization.

12223550 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 244483 (or 244478 counting only the distinct ones).

The product of its (nonzero) digits is 600, while the sum is 20.

The square root of 12223550 is about 3496.2193867090. The cubic root of 12223550 is about 230.3557820678.

Adding to 12223550 its reverse (5532221), we get a palindrome (17755771).

The spelling of 12223550 in words is "twelve million, two hundred twenty-three thousand, five hundred fifty".