22143450172 has 12 divisors (see below), whose sum is σ = 38780695800. Its totient is φ = 11063251376.

The previous prime is 22143450157. The next prime is 22143450187. The reversal of 22143450172 is 27105434122.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (22143450157) and next prime (22143450187).

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 2112547 + ... + 2123002.

It is an arithmetic number, because the mean of its divisors is an integer number (3231724650).

Almost surely, 2^22143450172 is an apocalyptic number.

It is an amenable number.

22143450172 is a deficient number, since it is larger than the sum of its proper divisors (16637245628).

22143450172 is a wasteful number, since it uses less digits than its factorization.

22143450172 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4236860 (or 4236858 counting only the distinct ones).

The product of its (nonzero) digits is 13440, while the sum is 31.

Adding to 22143450172 its reverse (27105434122), we get a palindrome (49248884294).

The spelling of 22143450172 in words is "twenty-two billion, one hundred forty-three million, four hundred fifty thousand, one hundred seventy-two".