225853515 has 20 divisors (see below), whose sum is σ = 404864064. Its totient is φ = 120454992.

The previous prime is 225853499. The next prime is 225853519. The reversal of 225853515 is 515358522.

225853515 is a `hidden beast` number, since 22 + 585 + 3 + 51 + 5 = 666.

It is not a de Polignac number, because 225853515 - 2⁴ = 225853499 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 225853515.

It is not an unprimeable number, because it can be changed into a prime (225853519) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 278427 + ... + 279236.

Almost surely, 2^225853515 is an apocalyptic number.

225853515 is a deficient number, since it is larger than the sum of its proper divisors (179010549).

225853515 is an equidigital number, since it uses as much as digits as its factorization.

225853515 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 557680 (or 557671 counting only the distinct ones).

The product of its digits is 60000, while the sum is 36.

The square root of 225853515 is about 15028.4235700222. The cubic root of 225853515 is about 608.9883033013.

The spelling of 225853515 in words is "two hundred twenty-five million, eight hundred fifty-three thousand, five hundred fifteen".