1223443200 has 216 divisors, whose sum is σ = 4614926848. Its totient is φ = 279613440.

The previous prime is 1223443187. The next prime is 1223443219. The reversal of 1223443200 is 23443221.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 129849 + ... + 138951.

Almost surely, 2^1223443200 is an apocalyptic number.

1223443200 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1223443200, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2307463424).

1223443200 is an abundant number, since it is smaller than the sum of its proper divisors (3391483648).

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

1223443200 is an equidigital number, since it uses as much as digits as its factorization.

1223443200 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9139 (or 9120 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 21.

The square root of 1223443200 is about 34977.7529295408. The cubic root of 1223443200 is about 1069.5340213393.

Adding to 1223443200 its sum of digits (21), we get a palindrome (1223443221).

Adding to 1223443200 its reverse (23443221), we get a palindrome (1246886421).

The spelling of 1223443200 in words is "one billion, two hundred twenty-three million, four hundred forty-three thousand, two hundred".