225443561 has 6 divisors (see below), whose sum is σ = 262250730. Its totient is φ = 193237296.

The previous prime is 225443557. The next prime is 225443597. The reversal of 225443561 is 165344522.

It can be written as a sum of positive squares in only one way, i.e., 221265625 + 4177936 = 14875^2 + 2044^2 .

It is not a de Polignac number, because 225443561 - 2² = 225443557 is a prime.

It is not an unprimeable number, because it can be changed into a prime (225443551) 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, 2300396 + ... + 2300493.

It is an arithmetic number, because the mean of its divisors is an integer number (43708455).

Almost surely, 2^225443561 is an apocalyptic number.

It is an amenable number.

225443561 is a deficient number, since it is larger than the sum of its proper divisors (36807169).

225443561 is an equidigital number, since it uses as much as digits as its factorization.

225443561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4600903 (or 4600896 counting only the distinct ones).

The product of its digits is 28800, while the sum is 32.

The square root of 225443561 is about 15014.7780869382. The cubic root of 225443561 is about 608.6196153680.

The spelling of 225443561 in words is "two hundred twenty-five million, four hundred forty-three thousand, five hundred sixty-one".