225440211 has 4 divisors (see below), whose sum is σ = 300586952. Its totient is φ = 150293472.

The previous prime is 225440209. The next prime is 225440221. The reversal of 225440211 is 112044522.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 225440211 - 2¹ = 225440209 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (225440221) 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 in 3 ways as a sum of consecutive naturals, for example, 37573366 + ... + 37573371.

It is an arithmetic number, because the mean of its divisors is an integer number (75146738).

Almost surely, 2^225440211 is an apocalyptic number.

225440211 is a deficient number, since it is larger than the sum of its proper divisors (75146741).

225440211 is an equidigital number, since it uses as much as digits as its factorization.

225440211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 75146740.

The product of its (nonzero) digits is 640, while the sum is 21.

The square root of 225440211 is about 15014.6665297635. Note that the first 3 decimals coincide. The cubic root of 225440211 is about 608.6166007394.

Adding to 225440211 its reverse (112044522), we get a palindrome (337484733).

The spelling of 225440211 in words is "two hundred twenty-five million, four hundred forty thousand, two hundred eleven".