225291285 has 36 divisors (see below), whose sum is σ = 404502852. Its totient is φ = 115992576.

The previous prime is 225291277. The next prime is 225291289. The reversal of 225291285 is 582192522.

225291285 is a `hidden beast` number, since 2 + 2 + 529 + 128 + 5 = 666.

It can be written as a sum of positive squares in 6 ways, for example, as 33108516 + 192182769 = 5754^2 + 13863^2 .

It is not a de Polignac number, because 225291285 - 2³ = 225291277 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (225291289) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 34869 + ... + 40821.

Almost surely, 2^225291285 is an apocalyptic number.

It is an amenable number.

225291285 is a deficient number, since it is larger than the sum of its proper divisors (179211567).

225291285 is a wasteful number, since it uses less digits than its factorization.

225291285 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6022 (or 5990 counting only the distinct ones).

The product of its digits is 28800, while the sum is 36.

The square root of 225291285 is about 15009.7063595528. The cubic root of 225291285 is about 608.4825536655.

The spelling of 225291285 in words is "two hundred twenty-five million, two hundred ninety-one thousand, two hundred eighty-five".