1222240500 has 288 divisors, whose sum is σ = 4400192160. Its totient is φ = 282931200.

The previous prime is 1222240489. The next prime is 1222240501. The reversal of 1222240500 is 50422221.

1222240500 is a `hidden beast` number, since 122 + 2 + 2 + 40 + 500 = 666.

1222240500 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 16 ways, for example, as 519566436 + 702674064 = 22794^2 + 26508^2 .

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1222240501) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 993886 + ... + 995114.

It is an arithmetic number, because the mean of its divisors is an integer number (15278445).

Almost surely, 2^1222240500 is an apocalyptic number.

1222240500 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 1222240500, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2200096080).

1222240500 is an abundant number, since it is smaller than the sum of its proper divisors (3177951660).

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

1222240500 is a wasteful number, since it uses less digits than its factorization.

1222240500 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1284 (or 1269 counting only the distinct ones).

The product of its (nonzero) digits is 320, while the sum is 18.

The square root of 1222240500 is about 34960.5563456876. The cubic root of 1222240500 is about 1069.1834396629.

Adding to 1222240500 its reverse (50422221), we get a palindrome (1272662721).

The spelling of 1222240500 in words is "one billion, two hundred twenty-two million, two hundred forty thousand, five hundred".