22143450173 has 4 divisors (see below), whose sum is σ = 23846792508. Its totient is φ = 20440107840.

The previous prime is 22143450157. The next prime is 22143450187. The reversal of 22143450173 is 37105434122.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 3767749924 + 18375700249 = 61382^2 + 135557^2 .

It is a cyclic number.

It is not a de Polignac number, because 22143450173 - 2⁴ = 22143450157 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22143456173) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 851671148 + ... + 851671173.

It is an arithmetic number, because the mean of its divisors is an integer number (5961698127).

Almost surely, 2^22143450173 is an apocalyptic number.

It is an amenable number.

22143450173 is a deficient number, since it is larger than the sum of its proper divisors (1703342335).

22143450173 is a wasteful number, since it uses less digits than its factorization.

22143450173 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1703342334.

The product of its (nonzero) digits is 20160, while the sum is 32.

Adding to 22143450173 its reverse (37105434122), we get a palindrome (59248884295).

The spelling of 22143450173 in words is "twenty-two billion, one hundred forty-three million, four hundred fifty thousand, one hundred seventy-three".