225543242112 has 128 divisors (see below), whose sum is σ = 638141898240. Its totient is φ = 70334619648.

The previous prime is 225543242033. The next prime is 225543242117. The reversal of 225543242112 is 211242345522.

It is a tau number, because it is divible by the number of its divisors (128).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (225543242117) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 986733 + ... + 1193619.

It is an arithmetic number, because the mean of its divisors is an integer number (4985483580).

Almost surely, 2^225543242112 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 225543242112, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (319070949120).

225543242112 is an abundant number, since it is smaller than the sum of its proper divisors (412598656128).

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

225543242112 is a wasteful number, since it uses less digits than its factorization.

225543242112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 207088 (or 207076 counting only the distinct ones).

The product of its digits is 38400, while the sum is 33.

Adding to 225543242112 its reverse (211242345522), we get a palindrome (436785587634).

The spelling of 225543242112 in words is "two hundred twenty-five billion, five hundred forty-three million, two hundred forty-two thousand, one hundred twelve".