225017245638169 has 2 divisors, whose sum is σ = 225017245638170. Its totient is φ = 225017245638168.

The previous prime is 225017245638139. The next prime is 225017245638179. The reversal of 225017245638169 is 961836542710522.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 129961824006400 + 95055421631769 = 11400080^2 + 9749637^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-225017245638169 is a prime.

It is a super-2 number, since 2×225017245638169² (a number of 30 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (225017245638139) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 112508622819084 + 112508622819085.

It is an arithmetic number, because the mean of its divisors is an integer number (112508622819085).

It is a 2-persistent number, because it is pandigital, and so is 2⋅225017245638169 = 450034491276338, but 3⋅225017245638169 = 675051736914507 is not.

Almost surely, 2^{225017245638169} is an apocalyptic number.

It is an amenable number.

225017245638169 is a deficient number, since it is larger than the sum of its proper divisors (1).

225017245638169 is an equidigital number, since it uses as much as digits as its factorization.

225017245638169 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 43545600, while the sum is 61.

The spelling of 225017245638169 in words is "two hundred twenty-five trillion, seventeen billion, two hundred forty-five million, six hundred thirty-eight thousand, one hundred sixty-nine".