225678647 has 4 divisors (see below), whose sum is σ = 225720360. Its totient is φ = 225636936.

The previous prime is 225678613. The next prime is 225678653. The reversal of 225678647 is 746876522.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 225678647 - 2²² = 221484343 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (225671647) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11273 + ... + 24050.

It is an arithmetic number, because the mean of its divisors is an integer number (56430090).

Almost surely, 2^225678647 is an apocalyptic number.

225678647 is a deficient number, since it is larger than the sum of its proper divisors (41713).

225678647 is an equidigital number, since it uses as much as digits as its factorization.

225678647 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41712.

The product of its digits is 1128960, while the sum is 47.

The square root of 225678647 is about 15022.6045345007. The cubic root of 225678647 is about 608.8310921659.

The spelling of 225678647 in words is "two hundred twenty-five million, six hundred seventy-eight thousand, six hundred forty-seven".