225345638 has 16 divisors (see below), whose sum is σ = 389919744. Its totient is φ = 95673480.

The previous prime is 225345623. The next prime is 225345649. The reversal of 225345638 is 836543522.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

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 in 7 ways as a sum of consecutive naturals, for example, 73718 + ... + 76713.

It is an arithmetic number, because the mean of its divisors is an integer number (24369984).

Almost surely, 2^225345638 is an apocalyptic number.

225345638 is a deficient number, since it is larger than the sum of its proper divisors (164574106).

225345638 is a wasteful number, since it uses less digits than its factorization.

225345638 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 150547.

The product of its digits is 172800, while the sum is 38.

The square root of 225345638 is about 15011.5168454091. The cubic root of 225345638 is about 608.5314831997.

The spelling of 225345638 in words is "two hundred twenty-five million, three hundred forty-five thousand, six hundred thirty-eight".