22143230312 has 128 divisors (see below), whose sum is σ = 51248332800. Its totient is φ = 8760787200.

The previous prime is 22143230311. The next prime is 22143230353. The reversal of 22143230312 is 21303234122.

It is a Harshad number since it is a multiple of its sum of digits (23).

It is not an unprimeable number, because it can be changed into a prime (22143230311) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 26391989 + ... + 26392827.

It is an arithmetic number, because the mean of its divisors is an integer number (400377600).

Almost surely, 2^22143230312 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 22143230312, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (25624166400).

22143230312 is an abundant number, since it is smaller than the sum of its proper divisors (29105102488).

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

22143230312 is a wasteful number, since it uses less digits than its factorization.

22143230312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1567 (or 1563 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 23.

Adding to 22143230312 its reverse (21303234122), we get a palindrome (43446464434).

The spelling of 22143230312 in words is "twenty-two billion, one hundred forty-three million, two hundred thirty thousand, three hundred twelve".