1222216800 has 432 divisors, whose sum is σ = 4880312640. Its totient is φ = 264176640.

The previous prime is 1222216783. The next prime is 1222216813. The reversal of 1222216800 is 86122221.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 2234127 + ... + 2234673.

It is an arithmetic number, because the mean of its divisors is an integer number (11297020).

Almost surely, 2^1222216800 is an apocalyptic number.

1222216800 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 1222216800, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2440156320).

1222216800 is an abundant number, since it is smaller than the sum of its proper divisors (3658095840).

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

1222216800 is a wasteful number, since it uses less digits than its factorization.

1222216800 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 603 (or 583 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 24.

The square root of 1222216800 is about 34960.2173906285. The cubic root of 1222216800 is about 1069.1765289086.

The spelling of 1222216800 in words is "one billion, two hundred twenty-two million, two hundred sixteen thousand, eight hundred".