225633281 has 4 divisors (see below), whose sum is σ = 225668100. Its totient is φ = 225598464.

The previous prime is 225633263. The next prime is 225633337. The reversal of 225633281 is 182336522.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 182336522 = 2 ⋅91168261.

It can be written as a sum of positive squares in 2 ways, for example, as 67502656 + 158130625 = 8216^2 + 12575^2 .

It is a cyclic number.

It is not a de Polignac number, because 225633281 - 2⁶ = 225633217 is a prime.

It is a super-3 number, since 3×225633281³ (a number of 26 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (225633211) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4496 + ... + 21713.

It is an arithmetic number, because the mean of its divisors is an integer number (56417025).

Almost surely, 2^225633281 is an apocalyptic number.

It is an amenable number.

225633281 is a deficient number, since it is larger than the sum of its proper divisors (34819).

225633281 is an equidigital number, since it uses as much as digits as its factorization.

225633281 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34818.

The product of its digits is 17280, while the sum is 32.

The square root of 225633281 is about 15021.0945340211. The cubic root of 225633281 is about 608.7902936195.

The spelling of 225633281 in words is "two hundred twenty-five million, six hundred thirty-three thousand, two hundred eighty-one".