225322281 has 6 divisors (see below), whose sum is σ = 325465530. Its totient is φ = 150214848.

The previous prime is 225322271. The next prime is 225322297. The reversal of 225322281 is 182223522.

225322281 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 172265625 + 53056656 = 13125^2 + 7284^2 .

It is not a de Polignac number, because 225322281 - 2⁶ = 225322217 is a prime.

It is a super-2 number, since 2×225322281² = 101540260630085922, which contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (225322231) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 12517896 + ... + 12517913.

It is an arithmetic number, because the mean of its divisors is an integer number (54244255).

Almost surely, 2^225322281 is an apocalyptic number.

It is an amenable number.

225322281 is a deficient number, since it is larger than the sum of its proper divisors (100143249).

225322281 is a wasteful number, since it uses less digits than its factorization.

225322281 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25035815 (or 25035812 counting only the distinct ones).

The product of its digits is 3840, while the sum is 27.

The square root of 225322281 is about 15010.7388558991. The cubic root of 225322281 is about 608.5104577783.

The spelling of 225322281 in words is "two hundred twenty-five million, three hundred twenty-two thousand, two hundred eighty-one".