225648619 has 4 divisors (see below), whose sum is σ = 257884144. Its totient is φ = 193413096.

The previous prime is 225648611. The next prime is 225648629. The reversal of 225648619 is 916846522.

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 225648619 - 2³ = 225648611 is a prime.

It is a super-2 number, since 2×225648619² = 101834598513214322, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (225648611) 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 3 ways as a sum of consecutive naturals, for example, 16117752 + ... + 16117765.

It is an arithmetic number, because the mean of its divisors is an integer number (64471036).

Almost surely, 2^225648619 is an apocalyptic number.

225648619 is a deficient number, since it is larger than the sum of its proper divisors (32235525).

225648619 is an equidigital number, since it uses as much as digits as its factorization.

225648619 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32235524.

The product of its digits is 207360, while the sum is 43.

The square root of 225648619 is about 15021.6050740259. The cubic root of 225648619 is about 608.8040879999.

The spelling of 225648619 in words is "two hundred twenty-five million, six hundred forty-eight thousand, six hundred nineteen".