1224513220 has 48 divisors (see below), whose sum is σ = 2945416320. Its totient is φ = 418892544.

The previous prime is 1224513181. The next prime is 1224513221. The reversal of 1224513220 is 223154221.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 1224513191 and 1224513200.

It is not an unprimeable number, because it can be changed into a prime (1224513221) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 54411 + ... + 73549.

It is an arithmetic number, because the mean of its divisors is an integer number (61362840).

Almost surely, 2^1224513220 is an apocalyptic number.

1224513220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1224513220 is an abundant number, since it is smaller than the sum of its proper divisors (1720903100).

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

1224513220 is a wasteful number, since it uses less digits than its factorization.

1224513220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19612 (or 19610 counting only the distinct ones).

The product of its (nonzero) digits is 960, while the sum is 22.

The square root of 1224513220 is about 34993.0453090325. The cubic root of 1224513220 is about 1069.8457343035.

Adding to 1224513220 its reverse (223154221), we get a palindrome (1447667441).

The spelling of 1224513220 in words is "one billion, two hundred twenty-four million, five hundred thirteen thousand, two hundred twenty".