225664445 has 8 divisors (see below), whose sum is σ = 271425336. Its totient is φ = 180112896.

The previous prime is 225664441. The next prime is 225664459. The reversal of 225664445 is 544466522.

It can be written as a sum of positive squares in 4 ways, for example, as 11978521 + 213685924 = 3461^2 + 14618^2 .

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 225664445 - 2² = 225664441 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 225664399 and 225664408.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (225664441) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 49952 + ... + 54281.

It is an arithmetic number, because the mean of its divisors is an integer number (33928167).

Almost surely, 2^225664445 is an apocalyptic number.

It is an amenable number.

225664445 is a deficient number, since it is larger than the sum of its proper divisors (45760891).

225664445 is a wasteful number, since it uses less digits than its factorization.

225664445 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 104671.

The product of its digits is 230400, while the sum is 38.

The square root of 225664445 is about 15022.1318393895. The cubic root of 225664445 is about 608.8183206127.

The spelling of 225664445 in words is "two hundred twenty-five million, six hundred sixty-four thousand, four hundred forty-five".