225205105 has 4 divisors (see below), whose sum is σ = 270246132. Its totient is φ = 180164080.

The previous prime is 225205093. The next prime is 225205117. The reversal of 225205105 is 501502522.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 501502522 = 2 ⋅250751261.

It is an interprime number because it is at equal distance from previous prime (225205093) and next prime (225205117).

It can be written as a sum of positive squares in 2 ways, for example, as 64625521 + 160579584 = 8039^2 + 12672^2 .

It is not a de Polignac number, because 225205105 - 2¹³ = 225196913 is a prime.

It is a super-3 number, since 3×225205105³ (a number of 26 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Smith number, since the sum of its digits (22) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 22520506 + ... + 22520515.

It is an arithmetic number, because the mean of its divisors is an integer number (67561533).

Almost surely, 2^225205105 is an apocalyptic number.

It is an amenable number.

225205105 is a deficient number, since it is larger than the sum of its proper divisors (45041027).

225205105 is an equidigital number, since it uses as much as digits as its factorization.

225205105 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45041026.

The product of its (nonzero) digits is 1000, while the sum is 22.

The square root of 225205105 is about 15006.8352759667. The cubic root of 225205105 is about 608.4049567678.

Adding to 225205105 its reverse (501502522), we get a palindrome (726707627).

The spelling of 225205105 in words is "two hundred twenty-five million, two hundred five thousand, one hundred five".