222312312 has 96 divisors (see below), whose sum is σ = 640458000. Its totient is φ = 69465600.

The previous prime is 222312271. The next prime is 222312323. The reversal of 222312312 is 213213222.

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

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

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 137364 + ... + 138972.

Almost surely, 2^222312312 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 222312312, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (320229000).

222312312 is an abundant number, since it is smaller than the sum of its proper divisors (418145688).

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

222312312 is a wasteful number, since it uses less digits than its factorization.

222312312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1741 (or 1734 counting only the distinct ones).

The product of its digits is 288, while the sum is 18.

The square root of 222312312 is about 14910.1412468159. The cubic root of 222312312 is about 605.7887052140.

Adding to 222312312 its reverse (213213222), we get a palindrome (435525534).

It can be divided in two parts, 2223 and 12312, that added together give a triangular number (14535 = T₁₇₀).

The spelling of 222312312 in words is "two hundred twenty-two million, three hundred twelve thousand, three hundred twelve".