225586161 has 8 divisors (see below), whose sum is σ = 334201760. Its totient is φ = 150390756.

The previous prime is 225586147. The next prime is 225586169. The reversal of 225586161 is 161685522.

It is not a de Polignac number, because 225586161 - 2¹⁹ = 225061873 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (225586169) 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, 4177495 + ... + 4177548.

It is an arithmetic number, because the mean of its divisors is an integer number (41775220).

Almost surely, 2^225586161 is an apocalyptic number.

It is an amenable number.

225586161 is a deficient number, since it is larger than the sum of its proper divisors (108615599).

225586161 is an equidigital number, since it uses as much as digits as its factorization.

225586161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8355052 (or 8355046 counting only the distinct ones).

The product of its digits is 28800, while the sum is 36.

The square root of 225586161 is about 15019.5259911889. The cubic root of 225586161 is about 608.7479118756.

The spelling of 225586161 in words is "two hundred twenty-five million, five hundred eighty-six thousand, one hundred sixty-one".