22231152444440 has 128 divisors (see below), whose sum is σ = 51206272588800. Its totient is φ = 8683811335680.

The previous prime is 22231152444383. The next prime is 22231152444443. The reversal of 22231152444440 is 4444425113222.

It is a junction number, because it is equal to n+sod(n) for n = 22231152444394 and 22231152444403.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22231152444443) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 341843207 + ... + 341908233.

It is an arithmetic number, because the mean of its divisors is an integer number (400049004600).

Almost surely, 2^{22231152444440} is an apocalyptic number.

22231152444440 is a gapful number since it is divisible by the number (20) 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 22231152444440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (25603136294400).

22231152444440 is an abundant number, since it is smaller than the sum of its proper divisors (28975120144360).

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

22231152444440 is a wasteful number, since it uses less digits than its factorization.

22231152444440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 66105 (or 66101 counting only the distinct ones).

The product of its (nonzero) digits is 245760, while the sum is 38.

Adding to 22231152444440 its reverse (4444425113222), we get a palindrome (26675577557662).

The spelling of 22231152444440 in words is "twenty-two trillion, two hundred thirty-one billion, one hundred fifty-two million, four hundred forty-four thousand, four hundred forty".