225905684 has 6 divisors (see below), whose sum is σ = 395334954. Its totient is φ = 112952840.

The previous prime is 225905681. The next prime is 225905689. The reversal of 225905684 is 486509522.

It can be written as a sum of positive squares in only one way, i.e., 191213584 + 34692100 = 13828^2 + 5890^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (225905681) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28238207 + ... + 28238214.

It is an arithmetic number, because the mean of its divisors is an integer number (65889159).

Almost surely, 2^225905684 is an apocalyptic number.

It is an amenable number.

225905684 is a deficient number, since it is larger than the sum of its proper divisors (169429270).

225905684 is a wasteful number, since it uses less digits than its factorization.

225905684 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 56476425 (or 56476423 counting only the distinct ones).

The product of its (nonzero) digits is 172800, while the sum is 41.

The square root of 225905684 is about 15030.1591475273. The cubic root of 225905684 is about 609.0351889489.

The spelling of 225905684 in words is "two hundred twenty-five million, nine hundred five thousand, six hundred eighty-four".