225847281 has 32 divisors (see below), whose sum is σ = 360852480. Its totient is φ = 124027200.

The previous prime is 225847277. The next prime is 225847283. The reversal of 225847281 is 182748522.

It is not a de Polignac number, because 225847281 - 2² = 225847277 is a prime.

It is a super-2 number, since 2×225847281² = 102013988670185922, which contains 22 as substring.

It is a Smith number, since the sum of its digits (39) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (225847283) 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 31 ways as a sum of consecutive naturals, for example, 6591 + ... + 22251.

It is an arithmetic number, because the mean of its divisors is an integer number (11276640).

Almost surely, 2^225847281 is an apocalyptic number.

It is an amenable number.

225847281 is a deficient number, since it is larger than the sum of its proper divisors (135005199).

225847281 is a wasteful number, since it uses less digits than its factorization.

225847281 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15717.

The product of its digits is 71680, while the sum is 39.

The square root of 225847281 is about 15028.2161616075. The cubic root of 225847281 is about 608.9827001592.

It can be divided in two parts, 225847 and 281, that added together give a triangular number (226128 = T₆₇₂).

The spelling of 225847281 in words is "two hundred twenty-five million, eight hundred forty-seven thousand, two hundred eighty-one".