225681161 has 8 divisors (see below), whose sum is σ = 234900480. Its totient is φ = 216557712.

The previous prime is 225681143. The next prime is 225681163. The reversal of 225681161 is 161186522.

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 225681161 - 2¹⁰ = 225680137 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (225681163) 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, 19145 + ... + 28598.

It is an arithmetic number, because the mean of its divisors is an integer number (29362560).

Almost surely, 2^225681161 is an apocalyptic number.

It is an amenable number.

225681161 is a deficient number, since it is larger than the sum of its proper divisors (9219319).

225681161 is a wasteful number, since it uses less digits than its factorization.

225681161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47935.

The product of its digits is 5760, while the sum is 32.

The square root of 225681161 is about 15022.6882081737. The cubic root of 225681161 is about 608.8333528962.

The spelling of 225681161 in words is "two hundred twenty-five million, six hundred eighty-one thousand, one hundred sixty-one".