225204145 has 4 divisors (see below), whose sum is σ = 270244980. Its totient is φ = 180163312.

The previous prime is 225204127. The next prime is 225204167. The reversal of 225204145 is 541402522.

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 70425664 + 154778481 = 8392^2 + 12441^2 .

It is a cyclic number.

It is not a de Polignac number, because 225204145 - 2⁹ = 225203633 is a prime.

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, 22520410 + ... + 22520419.

It is an arithmetic number, because the mean of its divisors is an integer number (67561245).

Almost surely, 2^225204145 is an apocalyptic number.

It is an amenable number.

225204145 is a deficient number, since it is larger than the sum of its proper divisors (45040835).

225204145 is an equidigital number, since it uses as much as digits as its factorization.

225204145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45040834.

The product of its (nonzero) digits is 3200, while the sum is 25.

The square root of 225204145 is about 15006.8032905079. The cubic root of 225204145 is about 608.4040922676.

Adding to 225204145 its reverse (541402522), we get a palindrome (766606667).

The spelling of 225204145 in words is "two hundred twenty-five million, two hundred four thousand, one hundred forty-five".