1222163500 has 48 divisors (see below), whose sum is σ = 2679872832. Its totient is φ = 486912000.

The previous prime is 1222163483. The next prime is 1222163519. The reversal of 1222163500 is 53612221.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 123745 + ... + 133255.

It is an arithmetic number, because the mean of its divisors is an integer number (55830684).

Almost surely, 2^1222163500 is an apocalyptic number.

1222163500 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 1222163500, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1339936416).

1222163500 is an abundant number, since it is smaller than the sum of its proper divisors (1457709332).

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

1222163500 is a wasteful number, since it uses less digits than its factorization.

1222163500 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9787 (or 9775 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 22.

The square root of 1222163500 is about 34959.4550872865. The cubic root of 1222163500 is about 1069.1609866749.

Adding to 1222163500 its reverse (53612221), we get a palindrome (1275775721).

The spelling of 1222163500 in words is "one billion, two hundred twenty-two million, one hundred sixty-three thousand, five hundred".