225633161 has 8 divisors (see below), whose sum is σ = 245220360. Its totient is φ = 206364672.

The previous prime is 225633131. The next prime is 225633173. The reversal of 225633161 is 161336522.

It can be written as a sum of positive squares in 4 ways, for example, as 35331136 + 190302025 = 5944^2 + 13795^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 225633161 - 2¹⁸ = 225371017 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (225633131) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 78200 + ... + 81033.

It is an arithmetic number, because the mean of its divisors is an integer number (30652545).

Almost surely, 2^225633161 is an apocalyptic number.

It is an amenable number.

225633161 is a deficient number, since it is larger than the sum of its proper divisors (19587199).

225633161 is a wasteful number, since it uses less digits than its factorization.

225633161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 159355.

The product of its digits is 6480, while the sum is 29.

The square root of 225633161 is about 15021.0905396379. The cubic root of 225633161 is about 608.7901856939.

Adding to 225633161 its reverse (161336522), we get a palindrome (386969683).

The spelling of 225633161 in words is "two hundred twenty-five million, six hundred thirty-three thousand, one hundred sixty-one".