1222182312 has 80 divisors (see below), whose sum is σ = 3311924640. Its totient is φ = 375845184.

The previous prime is 1222182289. The next prime is 1222182323. The reversal of 1222182312 is 2132812221.

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

It is a nude number because it is divisible by every one of its digits.

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 684573 + ... + 686355.

It is an arithmetic number, because the mean of its divisors is an integer number (41399058).

Almost surely, 2^1222182312 is an apocalyptic number.

1222182312 is a gapful number since it is divisible by the number (12) 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 1222182312, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1655962320).

1222182312 is an abundant number, since it is smaller than the sum of its proper divisors (2089742328).

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

1222182312 is an equidigital number, since it uses as much as digits as its factorization.

1222182312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1844 (or 1801 counting only the distinct ones).

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

The square root of 1222182312 is about 34959.7241407881. The cubic root of 1222182312 is about 1069.1664722894.

Adding to 1222182312 its reverse (2132812221), we get a palindrome (3354994533).

The spelling of 1222182312 in words is "one billion, two hundred twenty-two million, one hundred eighty-two thousand, three hundred twelve".