225863145 has 12 divisors (see below), whose sum is σ = 391496196. Its totient is φ = 120460320.

The previous prime is 225863119. The next prime is 225863147. The reversal of 225863145 is 541368522.

225863145 is a `hidden beast` number, since 2 + 2 + 586 + 31 + 45 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 38638656 + 187224489 = 6216^2 + 13683^2 .

It is not a de Polignac number, because 225863145 - 2⁷ = 225863017 is a prime.

It is a Smith number, since the sum of its digits (36) coincides with the sum of the digits of its prime factors.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (225863147) 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, 2509546 + ... + 2509635.

It is an arithmetic number, because the mean of its divisors is an integer number (32624683).

Almost surely, 2^225863145 is an apocalyptic number.

It is an amenable number.

225863145 is a deficient number, since it is larger than the sum of its proper divisors (165633051).

225863145 is a wasteful number, since it uses less digits than its factorization.

225863145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5019192 (or 5019189 counting only the distinct ones).

The product of its digits is 57600, while the sum is 36.

The square root of 225863145 is about 15028.7439594931. The cubic root of 225863145 is about 608.9969585780.

The spelling of 225863145 in words is "two hundred twenty-five million, eight hundred sixty-three thousand, one hundred forty-five".