1224313520 has 20 divisors (see below), whose sum is σ = 2846529120. Its totient is φ = 489725376.

The previous prime is 1224313513. The next prime is 1224313523. The reversal of 1224313520 is 253134221.

It is a tau number, because it is divible by the number of its divisors (20).

It is not an unprimeable number, because it can be changed into a prime (1224313523) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7651880 + ... + 7652039.

It is an arithmetic number, because the mean of its divisors is an integer number (142326456).

Almost surely, 2^1224313520 is an apocalyptic number.

1224313520 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1224313520 is an abundant number, since it is smaller than the sum of its proper divisors (1622215600).

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

1224313520 is a wasteful number, since it uses less digits than its factorization.

1224313520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15303932 (or 15303926 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 23.

The square root of 1224313520 is about 34990.1917685514. The cubic root of 1224313520 is about 1069.7875724683.

Adding to 1224313520 its reverse (253134221), we get a palindrome (1477447741).

The spelling of 1224313520 in words is "one billion, two hundred twenty-four million, three hundred thirteen thousand, five hundred twenty".