225405145 has 12 divisors (see below), whose sum is σ = 314647524. Its totient is φ = 154563360.

The previous prime is 225405143. The next prime is 225405163. The reversal of 225405145 is 541504522.

It can be written as a sum of positive squares in 2 ways, for example, as 134374464 + 91030681 = 11592^2 + 9541^2 .

It is not a de Polignac number, because 225405145 - 2¹ = 225405143 is a prime.

It is a super-3 number, since 3×225405145³ (a number of 26 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (225405143) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 459766 + ... + 460255.

It is an arithmetic number, because the mean of its divisors is an integer number (26220627).

Almost surely, 2^225405145 is an apocalyptic number.

It is an amenable number.

225405145 is a deficient number, since it is larger than the sum of its proper divisors (89242379).

225405145 is an equidigital number, since it uses as much as digits as its factorization.

225405145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 920040 (or 920033 counting only the distinct ones).

The product of its (nonzero) digits is 8000, while the sum is 28.

The square root of 225405145 is about 15013.4987594498. The cubic root of 225405145 is about 608.5850434346.

Adding to 225405145 its reverse (541504522), we get a palindrome (766909667).

The spelling of 225405145 in words is "two hundred twenty-five million, four hundred five thousand, one hundred forty-five".