1222006500 has 480 divisors, whose sum is σ = 4706013312. Its totient is φ = 272160000.

The previous prime is 1222006483. The next prime is 1222006547. The reversal of 1222006500 is 56002221.

1222006500 is a `hidden beast` number, since 12 + 2 + 2 + 0 + 0 + 650 + 0 = 666.

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

It is an unprimeable number.

It is a polite number, since it can be written in 159 ways as a sum of consecutive naturals, for example, 5791395 + ... + 5791605.

Almost surely, 2^1222006500 is an apocalyptic number.

1222006500 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 1222006500, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2353006656).

1222006500 is an abundant number, since it is smaller than the sum of its proper divisors (3484006812).

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

1222006500 is a wasteful number, since it uses less digits than its factorization.

1222006500 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 266 (or 245 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 18.

The square root of 1222006500 is about 34957.2095568282. The cubic root of 1222006500 is about 1069.1152029853.

Adding to 1222006500 its reverse (56002221), we get a palindrome (1278008721).

The spelling of 1222006500 in words is "one billion, two hundred twenty-two million, six thousand, five hundred".