225390205 has 8 divisors (see below), whose sum is σ = 270595800. Its totient is φ = 180227136.

The previous prime is 225390203. The next prime is 225390223. The reversal of 225390205 is 502093522.

It can be written as a sum of positive squares in 4 ways, for example, as 51308569 + 174081636 = 7163^2 + 13194^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 225390205 - 2¹ = 225390203 is a prime.

It is a super-4 number, since 4×225390205⁴ (a number of 35 digits) contains 4444 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (225390203) 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 7 ways as a sum of consecutive naturals, for example, 2511 + ... + 21379.

It is an arithmetic number, because the mean of its divisors is an integer number (33824475).

Almost surely, 2^225390205 is an apocalyptic number.

It is an amenable number.

225390205 is a deficient number, since it is larger than the sum of its proper divisors (45205595).

225390205 is a wasteful number, since it uses less digits than its factorization.

225390205 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21263.

The product of its (nonzero) digits is 5400, while the sum is 28.

The square root of 225390205 is about 15013.0011989609. The cubic root of 225390205 is about 608.5715973330.

The spelling of 225390205 in words is "two hundred twenty-five million, three hundred ninety thousand, two hundred five".