225545232173 has 2 divisors, whose sum is σ = 225545232174. Its totient is φ = 225545232172.

The previous prime is 225545232127. The next prime is 225545232191. The reversal of 225545232173 is 371232545522.

225545232173 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 180130638724 + 45414593449 = 424418^2 + 213107^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-225545232173 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 225545232173.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (225545232193) 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 as a sum of consecutive naturals, namely, 112772616086 + 112772616087.

It is an arithmetic number, because the mean of its divisors is an integer number (112772616087).

Almost surely, 2^225545232173 is an apocalyptic number.

It is an amenable number.

225545232173 is a deficient number, since it is larger than the sum of its proper divisors (1).

225545232173 is an equidigital number, since it uses as much as digits as its factorization.

225545232173 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 504000, while the sum is 41.

Adding to 225545232173 its reverse (371232545522), we get a palindrome (596777777695).

The spelling of 225545232173 in words is "two hundred twenty-five billion, five hundred forty-five million, two hundred thirty-two thousand, one hundred seventy-three".