225551005 has 4 divisors (see below), whose sum is σ = 270661212. Its totient is φ = 180440800.

The previous prime is 225551003. The next prime is 225551017. The reversal of 225551005 is 500155522.

It is a happy number.

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 113656921 + 111894084 = 10661^2 + 10578^2 .

It is not a de Polignac number, because 225551005 - 2¹ = 225551003 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 (225551003) 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, 22555096 + ... + 22555105.

It is an arithmetic number, because the mean of its divisors is an integer number (67665303).

Almost surely, 2^225551005 is an apocalyptic number.

It is an amenable number.

225551005 is a deficient number, since it is larger than the sum of its proper divisors (45110207).

225551005 is an equidigital number, since it uses as much as digits as its factorization.

225551005 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45110206.

The product of its (nonzero) digits is 2500, while the sum is 25.

The square root of 225551005 is about 15018.3556023954. The cubic root of 225551005 is about 608.7162872208.

The spelling of 225551005 in words is "two hundred twenty-five million, five hundred fifty-one thousand, five".