22231020312 has 96 divisors (see below), whose sum is σ = 61005653280. Its totient is φ = 7312780800.

The previous prime is 22231020283. The next prime is 22231020349. The reversal of 22231020312 is 21302013222.

22231020312 is a `hidden beast` number, since 2 + 22 + 310 + 20 + 312 = 666.

It is a super-2 number, since 2×22231020312² (a number of 21 digits) contains 22 as substring.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2271253 + ... + 2281019.

It is an arithmetic number, because the mean of its divisors is an integer number (635475555).

Almost surely, 2^22231020312 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 22231020312, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (30502826640).

22231020312 is an abundant number, since it is smaller than the sum of its proper divisors (38774632968).

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

22231020312 is a wasteful number, since it uses less digits than its factorization.

22231020312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10193 (or 10186 counting only the distinct ones).

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

Adding to 22231020312 its reverse (21302013222), we get a palindrome (43533033534).

The spelling of 22231020312 in words is "twenty-two billion, two hundred thirty-one million, twenty thousand, three hundred twelve".