1213404224 has 28 divisors (see below), whose sum is σ = 2436869904. Its totient is φ = 599389824.

The previous prime is 1213404221. The next prime is 1213404251. The reversal of 1213404224 is 4224043121.

It is a self number, because there is not a number n which added to its sum of digits gives 1213404224.

It is not an unprimeable number, because it can be changed into a prime (1213404221) 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, 108902 + ... + 119525.

It is an arithmetic number, because the mean of its divisors is an integer number (87031068).

Almost surely, 2^1213404224 is an apocalyptic number.

It is an amenable number.

1213404224 is an abundant number, since it is smaller than the sum of its proper divisors (1223465680).

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

1213404224 is an equidigital number, since it uses as much as digits as its factorization.

1213404224 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 228522 (or 228512 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 23.

The square root of 1213404224 is about 34833.9521731313. The cubic root of 1213404224 is about 1066.6006257724.

Adding to 1213404224 its reverse (4224043121), we get a palindrome (5437447345).

The spelling of 1213404224 in words is "one billion, two hundred thirteen million, four hundred four thousand, two hundred twenty-four".