225664443 has 24 divisors (see below), whose sum is σ = 354470688. Its totient is φ = 137763072.

The previous prime is 225664441. The next prime is 225664459. The reversal of 225664443 is 344466522.

225664443 is a `hidden beast` number, since 2 + 2 + 5 + 6 + 644 + 4 + 3 = 666.

It is not a de Polignac number, because 225664443 - 2¹ = 225664441 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 225664398 and 225664407.

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 23 ways as a sum of consecutive naturals, for example, 14271 + ... + 25592.

It is an arithmetic number, because the mean of its divisors is an integer number (14769612).

Almost surely, 2^225664443 is an apocalyptic number.

225664443 is a deficient number, since it is larger than the sum of its proper divisors (128806245).

225664443 is a wasteful number, since it uses less digits than its factorization.

225664443 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39923 (or 39920 counting only the distinct ones).

The product of its digits is 138240, while the sum is 36.

The square root of 225664443 is about 15022.1317728211. The cubic root of 225664443 is about 608.8183188141.

The spelling of 225664443 in words is "two hundred twenty-five million, six hundred sixty-four thousand, four hundred forty-three".